Ryan Mountcastle's Three-Home-Run Game, 2021

Ryan Mountcastle hit three home runs in one game for the Baltimore Orioles against the Toronto Blue Jays on June 19, 2021. The Baltimore Orioles lost 10–7.

The game was played at Oriole Park at Camden Yards in Baltimore. The announced attendance was 10,721. The game took 3h 10m. It was a day game under cloudy skies, at 83 degrees.

It was the only time Ryan Mountcastle managed it. Alek Manoah started for the Toronto Blue Jays. Roberto Ortiz umpired behind the plate. It is the seventh of fourteen three-home-run games the archive records that season.