Strokes Gained Explained: What Amateurs Actually Need to Know

Quick answer

Strokes lost by category, by handicap (approximate)

Handicap	SG: Off the Tee	SG: Approach	SG: Around the Green	SG: Putting	Total per round
Scratch	0	0	0	0	0
5	-0.9	-1.7	-0.8	-0.6	-4.0
10	-1.6	-3.2	-1.5	-1.1	-7.4
15	-2.5	-4.5	-2.3	-1.4	-10.7
20	-3.4	-5.9	-3.0	-1.7	-14.0

Approximate strokes lost per round versus a scratch baseline, drawn from Arccos’s amateur dataset as analyzed by Lou Stagner’s data-driven golf newsletter and corroborated by Shot Scope’s strokes-gained explainer. Numbers move with course conditions and sample size — treat them as calibration, not target.

Why traditional stats hide the real leaks

Fairways hit, greens in regulation, and putts per round are the stats most amateurs track. None of the three tell you where the strokes actually go.

A round with 80 percent fairways hit looks excellent until you notice 12 of those drives were 220-yard pokes into the first cut — the missed-fairway percentage hides a much larger scoring problem, which is the 30-yard distance gap to a scratch player on every tee. Greens in regulation has the same flaw. A 5-handicap who hits 9 greens at 40-foot proximity has a different round than a scratch player who hits 9 greens at 22-foot proximity. Same GIR, different scores.

Putts per round is the worst of the three. A round with 28 putts after hitting 8 greens often reflects a cold approach round — the player missed greens and chipped for par, which lowered the putt count without lowering the score. The variance in putts per round usually traces back to approach proximity, with the gap on the green sitting downstream of the gap from 150 yards.

Strokes Gained replaces these surface-level proxies with a context-aware accounting. Every shot is compared to a baseline drawn from thousands of similar shots. A 150-yard approach from the fairway has a PGA Tour baseline of about 2.98 strokes to hole out; hit it to 10 feet and the new baseline is 1.5; the gain is 2.98 minus 1.5 minus 1 for the shot itself, equal to +0.48 strokes on that single swing (PGA Tour methodology; Mark Broadie’s 2012 Interfaces paper).

The framework rewards outcome over appearance. A pretty swing that leaks 0.4 strokes loses to an awkward punch that gains 0.2.

The Strokes Gained framework, without the math

Mark Broadie, a Columbia Business School professor, introduced the framework in a 2008 paper on expected strokes to hole out and popularized it in his 2014 book Every Shot Counts. The PGA Tour adopted SG: Putting in 2011 and the four-category breakdown — Off the Tee, Approach, Around the Green, Putting — in 2016 (Wikipedia: strokes gained).

SG: Off the Tee covers every tee shot on a par 4 or par 5. The baseline accounts for hole length and par. A long drive that misses the fairway often gains strokes over a short drive that finds it, because the closer approach matters more than the lie.

SG: Approach the Green covers every shot longer than 30 yards from the green that is not a tee shot on a par 4 or par 5. This is iron and hybrid play to the green, plus the second shot on par 5s. It is the largest category by both shot count and scoring contribution at every handicap level.

SG: Around the Green covers every shot inside 30 yards that is not on the putting surface — chips, pitches, lobs, and greenside bunker shots. The baseline differs sharply by lie, so a buried sand shot is held to a different standard than a clean pitch from a tightly mown apron.

SG: Putting is every shot on the green. The baseline is the make percentage from each distance, drawn from Tour data, which assigns every putt a numeric reward or cost that adjusts for difficulty. Our Strokes Gained: Putting breakdown covers where amateurs actually leak putting strokes and how to read your own number.

SG: Tee-to-Green combines Off the Tee, Approach, and Around the Green. It is the best single ball-striking number Tour analysts use because it strips out putting variance. Scottie Scheffler led the PGA Tour in both SG: Total and SG: Tee-to-Green in 2024 by wide margins.

SG: Total adds putting to Tee-to-Green and is the overall scoring metric. Collin Morikawa led 2024 SG: Approach — a useful reminder that approach excellence and overall scoring excellence usually live in the same player but not always.

The math is mechanical. The interpretation is where the leverage lives.

Why approach is the biggest scoring lever for amateurs

Broadie’s analysis of millions of PGA Tour shots, published in his 2012 Interfaces paper, decomposed scoring variance across categories and showed approach play as the largest contributor — bigger than driving, short game, or putting — to the gap between elite and average tour players. The same pattern holds at the amateur level, only louder.

Lou Stagner’s analysis of Arccos amateur data anchors the amateur side of the story. Three concrete numbers from his and Shot Scope’s published material make the case:

• Iron-approach green-in-regulation rates fall steeply with handicap. Arccos data summarized in Stagner’s newsletter shows scratch players hit the green roughly 51 percent of the time, 5-handicaps around 43 percent, 10-handicaps near 34 percent, and 15-handicaps around 28 percent.
• Approach proximity widens with distance. The 100 to 175 yard “critical zone” — Stagner’s framing — drives more than half the approach-shot scoring deficit for most mid-handicaps.
• Averaged across every approach a player faces, the per-shot expectation gap between a scratch player and a 10-handicap runs roughly 0.10 to 0.15 strokes. Across 22 to 26 approach shots per round, that aggregates to 2 to 4 strokes — larger than the gaps in driving or putting at the same handicap tier.

The implication is unsubtle. A range session split 50/50 between driver and 9-iron is misallocated for almost every amateur. The 9-iron, the 8-iron, the 7-iron, and the wedges between 80 and 150 yards earn the bulk of the time. PracticeCaddie’s ball-striking drills post and the drill catalog both weight toward this zone for the same reason.

Reading your own data: four practical tools

Most amateurs do not track shot-level data. The tools that change that fall into four buckets.

Automatic sensor systems. Arccos Golf (grip sensors plus phone GPS, requires an annual subscription after the included trial) and Shot Scope (watch with tag sensors, one-time hardware purchase with no ongoing subscription) capture every shot location during the round and produce a full Strokes Gained breakdown after the round. Both publish handicap-stratified baselines so you compare against players of your tier rather than against tour averages.

Phone GPS with manual tagging. 18Birdies and Garmin’s Approach app log GPS shot locations when you tap. Less automation, but cheaper and more accurate than guessing. The trade is the cognitive load on the course.

Notebook proxies. Without a tool you can still track three numbers: approach proximity (eyeball after each green), putts per green hit (not putts per round), and up-and-down conversion rate inside 30 yards. The three together produce a rough Strokes Gained profile in five rows of a spreadsheet.

Free public tools. DataGolf’s true-SG query lets you compare any PGA Tour player against any other on any subset of rounds. The cheapest way to see what elite SG profiles look like before subscribing to anything.

Highest-leverage practice areas by handicap

Strokes Gained data has the same headline at every handicap level — approach matters most — but the order beneath the headline shifts. PracticeCaddie’s practice-plan-by-handicap guide walks through the full segmentation. The quick read:

• 25+ handicap. Approach is the biggest absolute gap, but ball contact is the gating issue beneath it. Spend the bulk of practice on full-swing contact (irons and wedges) before chasing proximity. Putting matters less than amateurs assume — the 25-handicap loses more strokes per round on a single 30-yard pitch shot than on a four-foot putt.

• 15 to 20 handicap. Approach proximity is the highest-leverage practice area. The 100 to 175 yard critical zone is where the strokes live. Stagner’s approach-proximity analysis shows mid-handicaps leave critical-zone shots roughly 50 to 75 percent farther from the hole than scratch players. Closing half that gap typically saves 1 to 2 strokes per round.

• 10 to 15 handicap. Approach is still the biggest leak, with short-game proximity (10 to 40 yard pitches) close behind. Driving distance matters more here than at any other level — closing a 25-yard distance gap to scratch shortens every approach by roughly one full club.

• 5 to 10 handicap. Approach is dominant but the absolute gap narrows. Wedge proximity from 50 to 125 yards starts to drive scoring as the iron play tightens. Putting variance — specifically three-putt avoidance — starts to matter on the margin.

• Single digit to scratch. Off-the-tee performance reasserts itself as the per-shot expectation gap on approach narrows. The path from a 5-handicap to scratch routes through driving distance and approach precision in roughly equal measure.

The course-management post covers the strategic translation of these handicap-specific priorities into hole-by-hole decisions on the course, and the swing-speed chart covers the distance side of SG: Off the Tee for any handicap.

When the data lies (or seems to)

Three caveats matter when reading personal Strokes Gained numbers.

Small samples are noisy. Inside a single round, weather, pin placements, and which specific holes you happened to mishit drive enough variance that a one-round SG: Approach of -3.5 can come back to -1.2 next round on the same course. Arccos’s documentation recommends a minimum of 10 rounds before drawing conclusions; 20 is better.

Course difficulty distorts category baselines. A round at a US Open setup with thick rough will show a worse SG: Approach than the same swing at a resort layout, because expected proximity from the same yardage is lower on the harder course. Read your numbers as a season trend, not a venue comparison.

Sample-rich tools beat sample-thin notebooks. If you only log 3 holes of approach proximity per round, the data does not stabilize until you have 100+ logged rounds. Tools that capture every shot get you to a usable signal in 10 rounds because the per-round shot count is 20 to 30 times larger.

Common mistakes amateurs make with Strokes Gained

Four patterns derail the framework even after the tool is installed.

• Optimizing for the wrong category. Most amateurs who buy a tracker spend the first month staring at SG: Putting because it feels familiar. The headline lives in SG: Approach. Look at the category bar chart on every post-round report and weight practice toward the biggest negative bar.

• Chasing one-round outliers. A round of +1.2 SG: Putting does not mean putting suddenly became a strength. Track the rolling 10-round average, ignore the single round.

• Ignoring the tee-to-green composite. SG: Tee-to-Green is the best ball-striking number Tour analysts use because it strips out putting variance. Amateurs who watch SG: Total alone get a noisier signal. The T2G number stabilizes faster and points at the bigger lever earlier.

• Treating the framework as a verdict. Strokes Gained surfaces leaks. The translation into practice is where the work happens. A round of -3.5 SG: Approach is a calibrated assignment — spend the next month on 100 to 175 yard iron play with a measurable proximity goal, then re-test.

Key takeaways

• Approach shots are the largest single component of the amateur-to-scratch scoring gap at every handicap tier. Practice weight should follow.
• Strokes Gained replaces fairways, GIR, and putts-per-round with a context-aware baseline. The math is mechanical — your shot is compared to thousands of similar shots by similar players.
• The four categories are SG: Off the Tee, Approach, Around the Green, and Putting. SG: Tee-to-Green and SG: Total are the composites that matter most for ball-striking and overall scoring.
• Scottie Scheffler led 2024 SG: Total and SG: Tee-to-Green by wide margins. Collin Morikawa led 2024 SG: Approach — see the PGA Tour 2024 stats page for the season-ending leaderboard.
• Sensor tools (Arccos, Shot Scope) produce usable Strokes Gained numbers in 10 to 15 rounds. Notebook proxies need 4 to 6 times as many rounds.
• The 100 to 175 yard critical zone is the highest-leverage practice area for 10 to 20 handicaps.
• PracticeCaddie’s AI plans weight practice toward your assessed leaks. Feed the data in and the plan biases toward the right zone. AI-generated plans are a Pro feature with a 3-day trial — sign up free, no credit card required.

Frequently asked questions

What is Strokes Gained in golf?

Strokes Gained measures how each shot compares to a baseline expectation drawn from thousands of similar shots by similar players. The formula is: expected strokes from the start position, minus expected strokes from the end position, minus 1 for the shot itself. A positive value means you outperformed the baseline; a negative value means you lost ground. Mark Broadie introduced the framework in a 2008 paper, and the PGA Tour adopted it for putting in 2011 and for the four full categories in 2016.

What are the four Strokes Gained categories?

The PGA Tour breaks performance into four categories. SG: Off the Tee covers tee shots on par 4s and par 5s. SG: Approach covers every shot longer than 30 yards that is not a par 4 or par 5 tee shot — iron and hybrid play to the green, plus second shots on par 5s. SG: Around the Green covers shots inside 30 yards but off the putting surface, including chips, pitches, and greenside bunker shots. SG: Putting covers every shot on the green. SG: Tee-to-Green adds the first three, and SG: Total adds all four.

Where do amateurs actually lose the most strokes?

Approach shots, by a wide margin. Arccos and Shot Scope amateur datasets, plus Lou Stagner’s analyses of those numbers, consistently show approach play as the largest single component of the gap between a mid-handicap and a scratch player. Putting and short game lose smaller portions because amateurs face fewer of those shots per round, and the per-shot expectation gap on a 150-yard iron is larger than on a four-foot putt.

Do I need an Arccos or Shot Scope subscription to use Strokes Gained?

No, but a sensor system pulls shot-level data automatically and saves an enormous amount of manual logging. Arccos uses grip sensors plus phone GPS and requires an annual subscription after the included trial. Shot Scope uses a watch with tag sensors as a one-time hardware purchase with no ongoing subscription fee. Garmin’s Approach line and 18Birdies use phone GPS with manual tagging. Without any tool, you can still log approach proximity, putts per green hit, and up-and-down rate in a notebook.

Why is putting not the biggest scoring lever for amateurs?

Putting accounts for less of the amateur-to-scratch gap than most golfers assume. PGA Tour pros make roughly 92 percent of 4-foot putts and 81 percent of 5-foot putts; amateurs are surprisingly close on short putts. Where amateurs leak strokes is approach proximity — the average 10-handicap leaves iron shots 40 to 60 feet from the hole, and three-putt rates rise sharply outside 30 feet. The putting gap is real, but it sits downstream of an approach gap that is roughly twice as large.

How many rounds do I need before my Strokes Gained numbers stabilize?

Roughly 10 to 15 tracked rounds is the working range. Inside a single round, weather, course difficulty, and pin placements drive enough variance that one-round numbers are mostly noise. Arccos’s own documentation recommends a minimum of 10 rounds before drawing conclusions, and PGA Tour SG rankings shift meaningfully across the season until about 16 to 20 rounds played. Track at least a month of regular rounds before changing a practice plan based on the data.

Should I prioritize distance or accuracy off the tee?

Distance, in most cases. Mark Broadie’s Every Shot Counts analysis and Lou Stagner’s Arccos data both show driving distance correlates more strongly with scoring than fairway percentage at every handicap level. A 15-handicap who adds 10 yards of carry typically gains roughly half a stroke per round, even with a small drop in fairways hit. The honest exception is the wild driver — golfers losing balls or hitting hazards on 25 percent or more of tee shots gain more by fixing dispersion before distance.

Related reading

• Strokes Gained: Approach Explained (And How to Fix Yours) — the deep dive on the single biggest category, with proximity data by distance and a practice protocol.

• Strokes Gained: Putting Explained (And Where Amateurs Actually Lose) — what the putting metric measures, the Tour make-rate data by distance, and the two places amateurs leak putting strokes.

• Golf Course Management Tips — translating Strokes Gained insights into hole-by-hole decisions.

• Block vs Random Practice in Golf: What the Research Actually Says — the motor-learning logic behind why approach-shot variety in practice transfers to course performance.

• 10 Golf Practice Drills Tour Coaches Actually Use — drill catalog weighted toward the high-leverage zones Strokes Gained surfaces.

• Ball-Striking Drills — drills for the approach-shot improvement that drives the biggest scoring lever.

• Golf Course Management Tips — translating Strokes Gained insights into hole-by-hole decisions.

• Golf Swing Speed Chart by Age and Handicap — the driving distance side of SG: Off the Tee.

• Strokes Gained: Putting Explained (And Where Amateurs Actually Lose) — what the putting metric measures, the Tour make-rate data by distance, and the two places amateurs leak putting strokes.

• Lag Putting Drills — eight calibrated speed-control drills for cutting three-putts from long range.

• Golf Practice Plan by Handicap — the practice-allocation guide that operationalizes Strokes Gained leverage at every level.