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.

Long, lanky, and bullishly strong, the Oakland A's Mark McGwire burst onto the Major League Baseball scene in his rookie season of 1987 by crushing a then rookie record 49 home runs. Sep 7, 1998 ...

Mark McGwire is one of the greatest home run hitters in baseball history. From the Oakland Athletics to the St. Louis Cardinals, Big Mac was a fearsome right-handed bat, and he was part of the ...

The PSA 10 Rookie Cards of Mark McGwire, Roger Clemens, & Kirby Puckett continue to command top dollar four decades after they first hit shelves.

ST. LOUIS -- Mark McGwire is back in baseball, reunited with Tony La Russa as the St. Louis Cardinals' hitting coach. La Russa agreed to return for a 15th year as manager yesterday with a one-year ...