Vintage Bubble Gum on Instagram: "Coming off a magical year in which Mark McGwire broke baseball’s single-season home run record with 70 long balls in 1998, Mark McGwire was having another outstanding campaign in 1999, with 28 home runs heading into the All-Star break. During the 1999 All-Star Game Home Run Derby, McGwire put on a show, hitting 13 first-round home runs and setting a then-single-round record. At one point, as flashbulbs popped, the slugger connected on 5 consecutive home runs, wi