Answer:

SOSA

AnswerCrossword Clue
SOSACubs' slugger
SOSACubs slugger Sammy
SOSASlugger Sammy of shady substances
SOSASlugger Sammy, whose name I only know because we're both from Chicago
SOSAHomer hero of '98
SOSACubs slugger
SOSABig Cub
SOSAHomer-hitting Sammy
SOSASlugger at Wrigley
SOSA2000 Home Run Derby champ
SOSASammy the slugger
SOSASlugger Sammy
SOSA1998 NL MVP
SOSACubs home-run champ
SOSAHitter of 600-plus homers
SOSAHitter of more than 600 homers
SOSAMcGwire rival
SOSA1998 McGwire rival
SOSAPeer of McGwire
SOSASammy who slugged
SOSASlugger traded away by George W. Bush during his Rangers tenure
SOSASlugger who retired in 2009
SOSALongtime Cub who was not invited to Wrigley Field's 100th anniversary game
SOSA"Slammin'" slugger
SOSA1998 N.L. MVP
SOSA2000 N.L. home run champ
SOSASammy of the Cubs
SOSAWrigley Field slugger
SOSAOnly player with three 60-homer seasons
SOSADominican slugger
SOSAOnetime Wrigley Field favorite
SOSASammy of the Orioles
SOSASlammin' Sammy
SOSASammy with three 60-homer seasons
SOSAHe hit his 600th homer 6-20-2007
SOSASlugger who rivaled McGwire
SOSASlugger with 588 lifetime homers
SOSAFifth 600-home-run-club member
SOSASammy in the 600 Home Run Club
SOSACubs' all-time home run leader