Sosa's 66th and final homer of 1998
The McGwire-Sosa home run chase helped make 1998 one of MLB's wildest seasons ever - ESPN
Sammy Sosa CRUSHES 64th and 65th home runs of 1998
Sosa-McGwire home run chase? We should have known better
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Remembering Mark McGwire, Sammy Sosa's Historic Summer of '98 Home Run Chase, News, Scores, Highlights, Stats, and Rumors
Sammy Sosa - Cooperstown Expert
Re-examining the 1998 Home Run Chase in Light of Steroid Disclosures - The New York Times
Tracking the Sosa-McGwire home run chase
Sammy Sosa: When 60 homers were not enough
Sammy Sosa Ends his BBWAA Balloting Far Away from Cooperstown - Cooperstown Cred
Cubs' red-hot Sosa slams two more HRs
Sammy Sosa – Society for American Baseball Research
The 20 greatest home runs in Cubs history, No. 17: Sammy Sosa, April 18, 2004 - Bleed Cubbie Blue
Sammy Sosa - Wikipedia