Duncan's Sensational 64 at Byron Nelson: Eagle and Birdie Barrage Set Pace

Back nine begins with a 275-yard drive on the par-5. Momentum building.

Fairway wood advances to 60 yards out. Positioned for scoring.

Sand wedge to 5 feet. Birdie is virtually assured.

Makes the birdie putt. Par-5 conversions are the foundation of this 64.

A mighty 295-yard drive sets the stage for the day's highlight.

Precision iron strike leaves just 8 feet. The stage is set for the day's star moment.

Tee shot drifts left, leaving an awkward approach. Par-3 trouble begins early.

Chips from rough, but leaves himself a testing 4-footer for par.

Misses the par putt, facing another test. Costly bogey looms with SG of -0.95.

Makes the short putt for bogey. First blemish of the round.

Crushes a 280-yard drive, positioning himself perfectly for a par-5 attack.

Fairway wood advances him to 50 yards out. Efficient positioning for birdie.

Pitches to 5 feet. Birdie is within reach with a steady stroke.

Converts the birdie putt. Steady SG gain of +0.62 on the par-5.

Another powerful drive at 280 yards puts him in scoring position from 150 out.

Mid-iron strikes to 5 feet. Excellent positioning for a strong SG gain of +1.2.

Drains the birdie putt. Aggressive play on par-4s is paying dividends.

A 285-yard tee shot establishes ideal positioning on this par-5.

3-wood moves him into position for a scoring approach from 55 yards.

Sand wedge positions him inside 5 feet. The birdie factory is humming.

Makes another birdie. +0.62 stroke gain on par-5s showcases his length advantage.

Tee shot drifts right, leaving 30 yards to the pin. Par-3 struggles persist.

Pitches to the green but stops short at 4 feet. Another par-3 test.

Misses the par putt again, setting up another bogey. SG of -0.95 hurts.

Concedes the second bogey. Par-3s have been a weak point.

A booming 290-yard drive sets up an aggressive approach on par-4.

Mid-iron strike finds 5 feet. Excellent positioning yielding +1.2 stroke gain.

Converts for birdie. Aggressive form bounces back after the par-3 struggles.

Powerful 285-yard drive sets up a birdie opportunity on the closing par-4.

Iron strikes to 5 feet on the final par-4. Perfect positioning for the day.

Final putt drops for birdie. Strong finish to a -7 opening round.