The Big 5 — A Rundown of Major Mark McGwire Rookie Cards – Wax Pack Gods
Mark McGwire - Wikipedia
Mark McGwire - Wikipedia
The worst free-agent contracts in Red Sox history (and some that weren't so bad after all)
What's the Best Mark McGwire Rookie Card? - MoneyMade
Stroke Of Genius - Sports Illustrated Vault
Mark Mcgwire Reggie Jackson Jose Canseco Signed8x10 Photo (jsa Coa)
What is more impressive: pitching/hitting a perfect game or throwing/catching an unassisted triple play in baseball history? - Quora
Building the A's best 25-man roster from their Oakland era - The Athletic