The McGwire-Sosa home run chase helped make 1998 one of MLB's wildest seasons ever - ESPN
Hall of Fame candidate breakdown: Mark McGwire
McGwire admits he used steroids
Mark McGwire: I still would've hit 70 HRs without PEDs
Mark McGwire 70 Home Runs
ESPN - 20 years ago, a fan caught Mark McGwire's 70th home run ball and made BANK. (via Darren Rovell)
JAWS and the 2013 Hall of Fame ballot: Mark McGwire - Sports Illustrated
Nov. 11, 2001: The day Mark McGwire faxed in his retirement to ESPN
Retiring Ryan Howard is MLB's true single-season home run king
Re-examining the 1998 Home Run Chase in Light of Steroid Disclosures - The New York Times
Mark McGwire 70 St. Louis Cardinals Home Run King Poster - Costacos 1998 – Sports Poster Warehouse
1998 Pacific Home Run History #43 Mark McGwire/70!!! - NM-MT
Mark McGwire's quest for 70 home runs aided by Expos pitching
Value of Mark McGwire's 70th home run ball from historic 1998 season drops significantly
McGwire Ends With a Bang: Two Homers