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Fellow rookie Akie Iwai missed a 13-foot putt on the 18th hole that would have forced a playoff after tying the score at 21-under with a 16th-hole birdie.

Norman Powell turned the ball over with 3:36 left and the score tied at 100.

But Harden drove inside for a floater to tie the score at 98-98 with 18.7 seconds left.

Had Alejandro Garnacho or Patrick Dorgu done that in the second half when the score was 2-0, the nerve-jangling, head-splitting, chaotic ending would not have been required.

In the top of the seventh, Anthony Cavarretta tied the score with an RBI single and Ryder Frithsmith put Hart ahead with an RBI double.