Legendary baseball player Mark McGwire's 1999 Upper Deck Black Diamond Piece of History Mark McGwire PSA 9 POP3 No 10’s! trading card has surfaced on the secondary market with a price tag of $3,000.

The 1985 Topps Baseball Set stands alone as one of the defining sets of the 1980s, led by legendary rookie cards and a deep ...

Mark McGwire needs no reminders that the St. Louis Cardinals' offense sputtered into the All-Star break in his first season as hitting coach. While waiting for the hitters to take off under his ...

Los Angeles Dodgers batting coach Mark McGwire talks with players in the dugout before team batting practice before the baseball game against the Pittsburgh Pirates on Saturday, June 15, 2013, in ...