Alonso's 300th home run came off pitcher Kodai Senga to tie the game in the top of the ninth inning.
The veteran received a curtain call from the Mets faithful following the home run after spending the first seven years of his current eight-year career with the team.
Alonso now brings his 2026 season home run total to 36, along with 101 RBI, earning every cent of that five-year, $155 million contract he signed with the Orioles.
Alonso met with the group of fans who snagged his 300th home run, signing a ton of merchandise.
Baltimore currently sit with a 74-78 record after beating the Mets later on, as they now sit 2.5 games back of the Cleveland Guardians for that third and final Wild Card spot.
MAJOR LEAGUE BASEBALL
The MLB regular season is now in its final two months as the countdown to the Postseason begins!