Offered is the very pill that Mark McGwire deposited into the third level lounge box seat section of Three Rivers Stadium above the left-centerfield seats - a 444-foot shot! Official Major League baseball was retrieved by a fan, who has included his personal LOA, attesting to ownership of the ball and the date he got it, May 21, 2000 when mark McGwire hit the 540th homerun of his career. A monumental milestone homerun ball of one of the greatest home run hitters in history. Signed in blue ballpoint by McGwire on side panel (signature grades “9” out of a possible 10). Ball shows nice use with rubbed in stadium dirt evenly distributed and a scuffed area on opposite panel from the signature.