July 22 (UPI) -- San Francisco Giants rookie outfielder Mike Yastrzemski ended a crucial four-game series against the New York Mets with a walk-off home run.
Yastrzemski hit a 3-2 pitch from Mets reliever Robert Gsellman over the left-field wall Sunday afternoon. The home run, Yastrzemski's ninth of the year, clinched a 2-1 victory at Oracle Park.