Mets' Pete Alonso wins Baseball America's 2019 Rookie of the Year unanimouslyAlonso blasted 53 home runs, setting a new MLB rookie record10/11/2019, 5:13 PMAug 9, 2019; New York City, NY, USA; New York Mets first baseman Pete Alonso (20) reacts after hitting a two run home run in the fourth inning against the Washington Nationals at Citi Field. Mandatory Credit: Wendell Cruz-USA TODAY Sports / Wendell Cruz