Baseball History · On This Day On This Day: May 31 Posted on May 31, 2020 by Baseballia 2001At Safeco Field, Seattle Mariners ace Aaron Sele edges the Baltimore Orioles, 2-1. Sele is now 8-0 and the Mariners are 40-12 en route to a record 116-win season! The Orioles’ only run is Cal Ripken, Jr.’s 420th career home run.