Big Mac's slam is 31st homer

Name: Big Mac's slam is 31st homer
Uploaded: 1998-06-12
Duration: 1 min 1 s
Description: 6/12/98: Mark McGwire hits a grand slam for his 31st home run of the season

Cardinals @ D-backs

June 12, 1998 | 00:01:01

6/12/98: Mark McGwire hits a grand slam for his 31st home run of the season

Mark McGwire
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