On August 15, 2012, Seattle Mariners pitcher Félix Hernández pitched the 23rd perfect game in Major League Baseball (MLB) history and the first in Mariners' franchise history.

[1] Pitching to catcher John Jaso against the Tampa Bay Rays at Safeco Field in Seattle, Washington, Hernández retired all 27 batters that he faced and tallied 12 strikeouts in a 1–0 victory.

[5] It also marked the third time the Tampa Bay Rays had been on the receiving end of a perfect game in four seasons, having previously failed to reach first base against Dallas Braden in 2010 and Mark Buehrle in 2009.

[1] Evan Longoria, Carlos Peña, Melvin Upton, Jr., and Ben Zobrist all played for the Rays in all three games, tying Alfredo Griffin's dubious mark for most losing perfect games played in.

[6] Rays manager Joe Maddon was ejected from the game in the seventh inning for arguing a called strike with the home plate umpire Rob Drake.