Mark McGwire of the Oakland A’s becomes the first rookie to hit 30 home runs before the All-Star break
On July 5, 1987, Mark McGwire of the Oakland A’s becomes the first rookie to hit 30 home runs before the All-Star break. McGwire’s latest long ball helps the A’s to a 6-2 win over the Boston Red Sox. McGwire’s teammate, Jose Canseco, adds a pair of home runs. The Oakland infielder will finish the…