Birdie GAi · Swing Analysis — Marcelo Klujsza

1 Executive summary

Bottom line: Marcelo's driver is efficient but not yet accurate. He swings about 92 mph and converts that speed very well: a 1.46 smash factor, and 233 yds of total distance, about 20 yds more than a typical amateur at his speed. The video explains why. The head stays centered, he holds the wrist angle late, the lower body starts the downswing, and the finish is balanced.

The yards he's leaving on the table are about direction and consistency, not power. The club travels out-to-in on all 7 shots (about −5° on average), and the face points left of the target on 6 of them. The result is a ball that starts and finishes left, landing on average ~22 yds left. He also has two low "skimmers" launched under 7°, and spin swings from about 2,000 to 4,800 rpm. His best drive carried 216 yds, close to the LPGA Tour average. Making that shot the norm is the goal.

Strength

Efficiency & motion

A 1.46 smash factor and above-average distance for his speed, backed by a centered pivot, late wrist release and a balanced finish.

Priority 1

Club path & face

The path averages −4.9° out-to-in and the face −3.2° left, so the ball misses left. The aim is a path near zero and the face square to the target.

Priority 2

Strike consistency

Two shots launched under 7° and spin ranges 2,000–4,800 rpm. A steadier strike and launch of 13–15° would lock in ~215-yd carries.

What changed from v1: the first version was built from the video alone, and inferred from Marcelo's setup that he hit level or slightly down on the driver. The launch data shows he already hits slightly up, averaging +1.8°, so that point has been corrected. The real priority, direction, only shows up in the club data.

2 Launch-monitor data — session of Oct 6, 2026

Seven drives with the driver, 12:42–12:48 PM. The averages use the six complete shots, because the seventh arrived with its last fields cut off. Negative path, face or direction means left of the target, for a right-handed golfer.

#	Club mph	Attack	Path	Face	Ball mph	Smash	Launch	Spin rpm	Apex yds	Carry	Total	Miss
1	88.2	+8.2°	−5.9°	−9.1°	133.8	1.52	13.3°	3,092*	26	216	235	25 L
2	92.9	−2.7°	−7.7°	−5.4°	129.1	1.39	15.4°	2,312	25	211	233	14 L
3	90.7	−0.6°	−10.5°	+5.2°	139.2	1.54	5.9°	2,033	7	173	251	13 R
4	96.6	−0.8°	−0.2°	−3.4°	136.1	1.41	11.8°	4,778	26	204	219	45 L
5	90.9	+2.6°	−0.9°	−4.2°	131.5	1.45	15.4°	3,860	31	207	223	36 L
6	91.3	+3.8°	−4.1°	−2.2°	136.2	1.49	6.9°	2,044*	7	160	239	22 L
7	86.1	n/a	−8.7°	−5.0°	128.6	1.49	13.9°	1,128*	13	173	cut	cut
Avg 1–6	91.8	+1.8°	−4.9°	−3.2°	134.3	1.46	11.4°	3,020	20	195	233	22 L

*Spin marked "predicted" by the device rather than measured. Distances are in yards. "Miss" is the carry offline distance.

What the numbers say

Speed and efficiency are solid. A 1.46 smash is close to the ~1.48 the LPGA Tour gets from its averages (139 ÷ 94). Contact quality per swing is good.
Direction is the leak. The path is left of target on 7 of 7 shots and the face on 6 of 7. When face and path both point left, the ball starts left and stays left (shots 1, 2, 4, 5 and 7).
Shot 3 is the mirror image. The face was open (+5.2°) to a strongly out-to-in path (−10.5°), producing a 15.8° face-to-path gap: a slice that finished right.
Two low skimmers (shots 3 and 6): launch under 7° and apex around 7 yds. They roll out but only carry 160–173. On a course like the Olympic, carry over sand and rough matters more than roll.

The best shot is the blueprint

Shot 1: +8.2° attack, 13.3° launch, ~3,100 rpm and a 1.52 smash, carrying 216 yds at only 88 mph. That's LPGA-average carry (220) at a lower club speed.

Shot 2 had the ideal launch window (15.4°, 2,312 rpm) but a weaker strike (1.39 smash).

Combine shot 2's launch and spin with shot 1's strike quality at his average 92 mph, and a 215–225 yd carry is realistic.

Two data checks

Air settings: the monitor recorded an air pressure of 94.6 kPa and an air density of 1.109 g/L. That matches about 550 m (1,800 ft) of altitude, not Rio at sea level (about 101 kPa and 1.18 g/L). Thinner air flies farther, so these distances are probably ~3–4% generous, about 6–8 yds on carry. At true Rio conditions, his average carry is likely ~187–189 yds. It's worth checking the device's location setting.
Tempo: the device reports ~1.04 s backswing and ~0.14 s downswing (≈7:1). The video at 30 fps measures ~0.75 s and ~0.28 s (≈2.6:1). A 0.14 s downswing is implausibly fast for 92 mph, so the device likely times the phases differently. This report uses the video tempo.

3 Driver benchmarks — USA, Tours & Brazil

Marcelo's session averages against published benchmarks.

USA amateurs by handicap (TrackMan data)

Player group	Club speed	Total distance
Average male amateur (handicap ~14–15)	93.4 mph	214 yds
15–20 handicap	91 mph	211 yds
10–15 handicap	95 mph	223 yds
0–5 handicap	106 mph	245 yds
Scratch and better	110 mph	252 yds
Marcelo (6-shot avg)	91.8 mph	233 yds

At the speed of a 15–20 handicapper, Marcelo hits it as far as a 10–15 handicapper, and further. Even after trimming for the air setting, he's still ahead of his speed band. That's efficiency, and it's the hard part.

Professional tours (TrackMan tour averages, driver)

Metric	Marcelo (avg)	Marcelo (best, #1)	LPGA Tour avg	PGA Tour avg
Club speed	91.8 mph	88.2 mph	94 mph	115 mph
Ball speed	134.3 mph	133.8 mph	139 mph	171 mph
Smash factor	1.46	1.52	~1.48	~1.49
Spin rate	~3,020 rpm	~3,090 rpm	n/a	2,545 rpm
Carry	195 yds	216 yds	220 yds	282 yds
Total distance	233 yds	235 yds	246 yds	~300 yds

The LPGA is the closest comparison, since his club speed is only ~2 mph lower. The 25-yd carry gap is mostly consistency: two low skimmers and the leftward misses pull the average down. His best shot is already at LPGA level.

Brazil

Reference	Figure	What it means for Marcelo
Fred Biondi, Brazil's top-ranked men's professional (2023 NCAA champion, now on the US circuit)	296.6 yds avg driving distance (2025 season)	Brazil's elite benchmark sits right at the PGA Tour average, about 64 yds past Marcelo's total.
Golfers in Brazil (CBG)	~20,000 players, about half federated	A small, mostly club-based amateur community. There's no public national database of amateur driver data.
Handicap system	World Handicap System, run by CBGolfe	A Brazilian handicap index means the same as a US one, so the TrackMan handicap bands above apply directly. On distance, Marcelo plays like a 10–15 handicapper.
Olympic Golf Course (Gil Hanse, 2016 Games)	Par 71 · ~7,128 yds from the back tees	Sandy, dune terrain with constant coastal wind. His high-spin shots (3,900–4,800 rpm) will balloon in the wind, and his leftward miss brings the native sand areas into play.

4 Swing sequence

Eight key positions from the video, filmed face-on at the Olympic Golf Course.

Photos are numbered in the order they happen in the swing; the names follow the standard swing positions. The video runs at 30 fps, so timestamps are accurate to about ±0.03 s. We don't know which of the 7 monitor shots this swing is; the movement patterns are read as representative of the session.

5 Position-by-position biomechanics

Photo 1 — Address Check alignment

The ball position is correct, just inside the lead heel, and the posture is relaxed and athletic.
The stance is about shoulder-width. A slightly wider base suits the driver and adds stability.
Data link: a path that's out-to-in on every shot often starts at address, with shoulders aimed left of the feet. That can't be judged face-on, so check it on a down-the-line video with an alignment stick across the shoulders.
The attack angle is already positive on average (+1.8°), but it ranges from −2.7° to +8.2°. A consistent setup, with the trail shoulder slightly lower and the ball teed half above the crown, makes that number repeatable.

Photo 2 — Takeaway Good

A one-piece start: arms, hands and club move away together, with good width.
The head stays centered, with no sway away from the target.

Photo 3 — Halfway back Good

The wrists hinge on time, setting the club up at about lead-arm-parallel.
The lower body stays quiet while the upper body keeps turning.

Photo 4 — Top of backswing Full & centered

The shaft reaches about parallel to the ground, a full driver backswing without overswinging.
The head stays over the ball, with no reverse pivot, which helps explain the strong 1.46 smash factor.
Watch: the lead knee moves noticeably toward the trail knee. It's fine as long as the trail knee keeps its flex.

Photo 5 — Transition & delivery Strong

The lower body starts the downswing: the lead hip moves toward the target while the club is still above the hands.
Lag: the shaft is still nearly vertical with the hands at chest height. The wrist angle is kept late, the source of his efficient speed.
Tempo (video): about 0.75 s back and 0.28–0.30 s down, a ratio near 2.6:1. Skilled players sit around 3:1.
Path question: the sequence here looks sound, so the out-to-in path in the data is more likely set up at address (alignment) or in the club's plane coming down. Neither can be judged from a face-on view. A down-the-line video would settle it.

Photo 6 — Impact Good

The hips are open to the target, the lead leg is posting up, and the trail heel is releasing, a powerful lower-body position.
The head stays at roughly its address position, behind where the ball was.
Data link: the face averages 3.2° left of the target at impact. With an out-to-in path, that's the signature of a pull. The face is the main driver of start direction, so it's the first thing to square up.

Photo 7 — Extension Excellent

Both arms extend fully toward the target after impact. That's a sign of a free release.

Photo 8 — Finish Excellent

A high, full finish: the belt buckle and chest face the target, the trail foot is up on its toe, and the weight is on the lead foot.
He holds his balance, which shows the speed is under control. This is an asset, so keep it.

6 Diagnosis — where the next yards are

Strong engine (video + data): a centered pivot, late release and lower-body-led sequence produce a 1.46 smash and above-average distance for 92 mph.
Out-to-in path (data, 7 of 7 shots, avg −4.9°): the club cuts across the ball from outside the target line. The likely causes are alignment and a steep delivery, to be confirmed on a down-the-line video.
Face left of target (data, 6 of 7, avg −3.2°): the ball starts left. With the face matching the path, it stays left. The result is a ~22-yd average miss left, up to 45 yds.
Inconsistent strike (data): two skimmers under 7° launch, spin from about 2,000 to 4,800 rpm, and attack angle from −2.7° to +8.2°. Inconsistent spot on the face and inconsistent attack angle cost ~40 yds of carry on the bad ones.
Opportunity: his best shot (216 carry) is already LPGA-level. Fixing direction and consistency, not chasing speed, is the fastest route to 215+ yd carries in play.

Confidence: high on 1, 2 and 3, which the data measures directly. Moderate on the causes of the path (alignment or steep delivery), because the video is face-on only.

7 Fixes & drills (in priority order)

Priority 1 · Path

Headcover gate

Place a headcover about 4 inches outside and slightly behind the ball. Swing without hitting it.

Blocks the out-to-in route and forces the club to approach from inside.

Priority 1 · Alignment

Three-stick setup check

Lay one stick along the target line and one along the toes. Hold a third across the shoulders. All three should be parallel before every rep.

Open shoulders at address are the most common hidden cause of an out-to-in path.

Priority 1 · Face

Start-line gate

Put two tees about 3 ft in front of the ball, 18 inches apart, on the target line. Start the ball through the gate.

The face controls start direction. This trains a square face, aimed at the −3.2° average.

Priority 2 · Strike

Face spray + tee height

Spray foot powder on the driver face, then hit 10 balls and read the marks. Tee so half the ball sits above the crown and aim for a strike just above center.

Low-face strikes create the skimmers. High-center contact raises launch and lowers spin.

Priority 2 · Attack angle

Tee-in-front drill

Push a second tee into the ground about 4 inches in front of the ball, on the target line. Strike the ball without hitting the front tee.

Narrows the −2.7° to +8.2° spread toward a consistent +2° to +4°.

Keep

Hold-the-finish rule

Hold every practice drive in the finish for a three-count.

Protects the balance and rotation that make him efficient.

8 4-week practice plan

Week	Focus	Session (≈50 balls)
1	Alignment & path	Down-the-line video (5 swings) · three-stick setup on every rep · 30 drivers with the headcover gate at 80% effort
2	Face & start line	20 start-line gate shots · 20 full drivers · 10 shots logging path and face on the monitor
3	Strike & launch	Face spray (10 balls) · 20 tee-in-front shots · 20 full drivers, logging launch and spin
4	Retest & course	A 10-shot monitor retest against these numbers, with the location set to Rio · 9 holes at the Olympic Course, logging fairways hit and the miss side

Targets to track on the monitor

Club path: −4.9° → −2° to +2°

Face to target: −3.2° → within ±2°

Average miss: 22 yds left → under 12 yds

Launch: 11.4° (5.9–15.4) → 13–15°, none under 9°

Spin: ~3,020 (2,000–4,800) → 2,300–2,800 rpm

Carry: 195 → 210–220 yds · smash: keep ≥ 1.45

The target ranges are general driver optimization windows for ~90–95 mph club speed, anchored to his own best shots (#1 and #2).

9 Limitations & next capture

The video is one face-on swing, and we don't know which of the 7 monitor shots it is. Swing plane, alignment and the cause of the out-to-in path need a down-the-line view.
The monitor data is 7 shots. The seventh arrived truncated, and three spin values are the device's prediction rather than a measurement.
The device's air settings look like ~550 m of altitude rather than Rio at sea level, so distances may be ~3–4% generous.
The device's tempo timing disagrees with the video. This report uses the video measurement.

For the next session: set the monitor's location to Rio, film down-the-line and face-on at hand height in slow motion (120–240 fps), and capture 10+ drivers, noting which shot each video clip matches.