Michigan football coach Jim Harbaugh will throw out the ceremonial first pitch on Tuesday at Comerica Park before the Tigers take on the Pirates at 7:08 p.m.
It is the first game of a three-game set against Pittsburgh. The scheduled starters are Justin Verlander against Gerrit Cole.
The Tigers are off on Monday.
Harbaugh was a guest of the Oakland A's at their spring training camp in Mesa, Arizona, in March and coached first base in an exhibition game against the Angels.
Harbaugh is friends with Athletics manager Bob Melvin.