Mark McGwire is a Baseball-Player, currently playing for . Mark McGwire was born in in . There are currently 9464 Cards of Mark McGwire in our Database including 1 rookie Cards and 7298 variations Cards. The most valuable Card of Mark McGwire is currently 1985 Topps #401 Mark McGwire PSA 10 by Topps from 1985 with a worth of approx. $2999.0.