Peter Morgan Alonso (born December 7, 1994), nicknamed "Polar Bear",[1][2][3] is an American professional baseball first baseman for the New York Mets of Major League Baseball (MLB). 

 He made his MLB debut during the 2019 season and broke the major league record for the most home runs by a rookie with 53. 

He was also the first Mets player to hit 50 or more home runs in a season, setting the Mets' single-season home run record in the process.

Pete Alonso does not take the Home Run Derby lightly

After winning in each of the last two events, the New York Mets first baseman is defending his title Monday night at Dodger Stadium. 

He's aiming to join Ken Griffey Jr. as the only other player to win the event three times. Nobody has ever won three times in a row.

Per the team's Twitter page, Alonso hit the gym and powered up with some deadlifts before taking his first turn.

Polar Bear Pete survived his first challenge, taking full advantage of his bonus time to defeat Atlanta Braves star Ronald Acuna Jr. in the opening round with 20 long balls.

The All-Star advanced to the second round, where he'll face Julio Rodriguez. The 21-year-old rookie phenom put on a show to start the Derby by crushing 32 home runs. He won't be an easy adversary for Alonso.

Midway through his fourth MLB season, Alonso has already swatted 130 actual home runs for the Mets. He also set a franchise record with 78 RBI at the All-Star break.