Pete Alonso didn't officially make any errors Friday night, but he still faulted himself for a major miscue.
Alonso's Mets took on the Cardinals, whose touted shortstop, Masyn Winn, made his major league debut in the second game of the four-game series in St. Louis.
Winn struck out in his first at bat, then stepped to the plate with two outs in the fifth inning and hit a chopper down the third-base line, beating the throw for his first big league hit. As the crowd cheered the rookie's feat, Alonso corralled the ball, gathered himself and then launched it into the stands at Busch Stadium, potentially depriving Winn of a lifelong memento as those cheers quickly turned into boos.