Mets rookie Pete Alonso still can't believe he's doing thisThe 24-year-old slugger has everyone, including himself, in awe6/11/2019, 9:11 PMJun 4, 2019; New York City, NY, USA; New York Mets first baseman Pete Alonso (20) hits a solo home run against the San Francisco Giants during the sixth inning at Citi Field. Mandatory Credit: Andy Marlin-USA TODAY Sports / Andy Marlin