Birdie GAiSwing Analysis
Driver · Full Swing Analysis

André Rennes

A frame-by-frame review of the October 11 driver swing at Crystal Springs, measured with the full reference frame (grid, center lines, diagonals and depth rays), with a comparison against his earlier driver reports and the link to today's iron struggles.

PlayerAndré Rennes (right-handed)
ClubDriver · report #3
LocationCrystal Springs Golf Course, Burlingame, CA
Footage1 swing · down-the-line, elevated
Session dateOctober 11, 2026

1 Executive summary

Bottom line: his best driver tempo on record, with a slow, full backswing of about 0.63 s and a 0.27 s downswing (~2.3:1, up from ~2:1), plus an excellent finish and hands that return to their address spot.

The one thing to fix is the same thing his irons show: the head moves about 5 inches down and 5½ inches toward the ball by impact while the hips rise ~3 inches. The chest tips over the ball. With a driver off a tee that usually shows up as heel or high-face contact and a ball that starts right or curves. With the long irons off the grass (today's 4-iron), the same move produces the top-and-chunk pattern.

Strength

Tempo and finish

~2.3:1 rhythm, the best of his 3 driver reports, and a balanced, full finish.

Priority 1

Head stays home

Keep the head inside its address box: no closer to the ball, no lower. This one fix carries over to the whole bag.

Priority 2

Keep the knees

Hold the knee flex into impact so the hips don't rise while the chest drops.

2 Ball flight

No launch monitor or range screen on this clip, and the ball leaves the frame right after impact, so there are no ball numbers for this report. For reference, his only driver readout (report #1, Oct 7, Mariners Point) was 213 yds carry / 241 total, 129 mph ball speed, 16° launch, 38 ft curve.

Next time, a photo of the range screen after the swing makes the comparison complete.

3 Timing & tempo — measured from the video

30 frames per second, so each time is accurate to about ±0.03 s. Takeaway at 12.13 s, top at 12.77 s, impact at 13.03 s.

GroupBackswingDownswingRatio
André (Driver #3, Oct 11)~0.63 s~0.27 s~2.3:1
André (Driver #2, Crystal Springs)~0.60 s~0.33 s~2:1
André (Driver #1, Oct 7)~0.5 s~0.25–0.3 s~2:1
André (6-iron #3, Oct 14, best iron)~0.60 s~0.23 s~2.6:1
André (4-iron, today)~0.40 s~0.27 s~1.5:1
PGA Tour (Tour Tempo, "24/8")~0.80 s~0.27 s3:1

Tour figure: John Novosel, Tour Tempo. One frame either way at the top moves the ratio between ~2.1:1 and ~2.6:1.

What it means: with the driver he gives himself time: same downswing speed as the 4-iron, but a backswing that's 50% longer. That's the rhythm to copy into the long irons.

4 The reference frame — how this swing was measured

Reference frame
  • Grid: each square is about 4 inches (48 px at ~12 px/in). It's scaled from his body size and the driver's length, so treat distances as ±1 inch.
  • Vertical and horizontal center lines (light green): fixed references for balance, spine and height.
  • Two corner diagonals (green): they cross at the frame's center and give a fixed perspective scaffold.
  • Depth rays (yellow, dashed): drawn from the vanishing point of the mat and the bay edges. Motion along them is motion toward the target (into the picture).
  • Address references: the white line is the top of the cap and the light-green line is the back of the head. The red trail is the head path and the yellow trail is the hands' path.
  • Body points were tracked on every frame (77 frames, 11.0–13.6 s), then checked by eye. The camera stayed still: the background moved less than 1 px.

5 Swing sequence

Nine key positions, filmed down-the-line from slightly above and behind the hands. The target is into the picture.

Photo 1 · Addresst 11.63s · frame 20
Photo 2 · Takeawayt 12.23s · frame 38
Photo 3 · Lead arm parallelt 12.37s · frame 42
Photo 4 · Topt 12.77s · frame 54
Photo 5 · Arm parallel (down)t 12.90s · frame 58
Photo 6 · Deliveryt 12.97s · frame 60
Photo 7 · Impactt 13.03s · frame 62
Photo 8 · Releaset 13.10s · frame 64
Photo 9 · Finisht 13.53s · frame 77

At the top the hands leave the left edge of the frame, so the yellow hand trail is cut off there.

6 Position-by-position biomechanics

Photo 1 — Address Good

  • Tall, athletic driver posture, with a wide stance and the ball teed up off the lead heel.
  • The arms hang relaxed, and the hands are just behind the ball, as they should be with a driver.

Photo 2 — Takeaway Good

  • A smooth, unhurried start: the club, arms and chest move away together.
  • The head starts to drift toward the ball right away. That's the first sign of the pattern.

Photo 3 — Lead arm parallel Wide

  • A wide arc, with the wrists not yet fully set.
  • The hips turn away and stay back (~3 in away from the ball): no sway toward it.
  • Head ~3 in lower and ~3 in closer to the ball than at address.

Photo 4 — Top Full turn

  • Full shoulder turn, and the hands go high (above the top edge of the frame).
  • The head is now ~3 in lower and ~5 in closer to the ball: the upper body is leaning in during the backswing.

Photo 5 — Arm parallel (down) Good sequence

  • The lower body starts down first and the lag holds.
  • The head keeps sinking (~4½ in down).

Photo 6 — Delivery Solid

  • The club drops in front of the trail hip, with the arms in front of the chest.
  • Hips still ~2 in back from their address line.

Photo 7 — Impact Watch the head

  • The hands come back to their address spot (within ~1 in).
  • The head is ~5 in lower and ~5½ in closer to the ball than at address.
  • The hips are ~3 in higher while the head is lower, so the chest is tipping over the ball.

Photo 8 — Release Full extension

  • Both arms extend after the ball, and the chest keeps rotating.
  • The head still dips (~6 in) just after impact, then rises into the finish.

Photo 9 — Finish Excellent

  • A full finish: weight on the lead leg, trail foot up on its toe, chest to the target.
  • A strong, committed finish, as in every driver report.

Overlay — head at address, top and impact

Measure (vs address)TopImpactDriver #1 (impact)Reading
Head, down~3 in~5 in~5 inFix same as always
Head, toward the ball~5 in~5½ in~2 inFix larger than #1
Hips, toward the ball−4 in (away)−1 in (away)—Good no thrust
Hips, height≈ same~3 in higher—Watch legs straighten
Hands at impact vs address—~1 in—Good back to the same spot

Depth note: the camera is slightly above, so part of the "down" reading can be the head moving toward the target along the depth rays. The "toward the ball" reading is the most reliable of the two.

7 One pattern, the whole bag

ReportHead down at impactHead toward the ballWhat it produces
Driver #3 · Oct 11~5 in~5½ inTee forgives it: contact high or toward the heel
6-Iron #3 · Oct 14~6 in~2 inHigh launch (20°)
4-Iron · today~7 indivesTop, chunk, right and left

The link: it's the same move in every club. The driver hides it because the ball sits on a tee and the swing is long and rhythmic. The 4-iron exposes it because the ball is on the grass and the backswing got rushed. Fix the head once and it fixes all three.

8 Diagnosis

  1. Tempo is his best driver rhythm (~2.3:1), and the downswing sequence is sound, with the lower body leading.
  2. The head works in and down: ~5 in down and ~5½ in toward the ball by impact, starting right from the takeaway.
  3. The hips rise ~3 in while the head drops: the knees straighten and the chest tips forward to reach the ball.
  4. Hands return to their address spot, and the finish is excellent.

Confidence: high on tempo (frame-by-frame); moderate on head and hip distances (±1 inch, grid scaled from body and club); no ball data on this clip.

9 Next steps — keep it simple

Priority 1 · Head home

Cap in the box

Same camera spot. Keep the cap under the white line and behind the green line until the ball is gone, for 10 balls.

Feel: "the chest turns, the head stays."

Priority 2 · Knees

Keep the flex

Feel the trail knee keep its bend into impact. Hit five drives at 80% holding that feeling.

The hips stay level, so the chest doesn't need to dive.

Keep · Tempo

Copy the driver count

Use this driver rhythm with the 4- and 5-iron: "one-two" back, "three" down.

The 4-iron backswing today was ~0.40 s. The driver shows he can do 0.63 s.

Keep

The finish

Hold the finish for 3 seconds, as here.

A balanced finish is the best sign the sequence worked.

10 Limitations & next capture

Next capture: (1) the camera at hip height, 3–4 steps back so the whole swing fits, (2) a range-screen photo after the swing, and (3) André's height, to lock the grid scale.