In the Cards’ 9 – 5 loss to the Diamondbacks, Mark McGwire belts a pair of homers, his 56th multi-homer game, which moves him into 4th place on this list ahead of Jimmie Foxx.
On July 2, 1999 In the Cards’ 9 – 5 loss to the Diamondbacks, Mark McGwire belts a pair of homers, his 56th multi-homer game, which moves him into 4th place on this list ahead of Jimmie Foxx. Source: Baseball Reference July 2