Tony Alcantar
Luis Sosa (voice)

Michael Benyaer
Sammy Sosa(voice)

Philip Maurice Hayes
Mark McGwire / Politician (voice)

Saffron Henderson
Raquel Sosa / Magalise Sosa (voice)

Paul Dobson
Omar Minaya / Domingo / Chicago Cubs' Assistant / Bill Clinton(voice)

Michael Dobson
St. Louis Cardinals' Announcer (voice)

Aaron Joseph
Luis Sosa as a Child (voice)

David Kaye
Male Reporter / Chicago Cubs' Play-by-Play Announcer / Second Reporter (voice)

Richard Newman
Chicago White Sox's Manager / Award Host (voice)

Scott McNeil
Play-by-play Announcer / Texas Rangers' Catcher (voice)

Zahf Paroo
Additional Voices (voice)

Tonjha Richardson
Marta (voice)

Alvin Sanders
Coach Billy Williams / Minor League Umpire / Chicago White Sox's Play-by-play An...

Brad Swaile
Sammy Sosa as a teenager / Child Fan #2 (voice)

Francisco Trujillo Avalos-Davidson
Juan Bautista Montero (voice)

Cathy Weseluck
The Sosa Family's Sister / Female Reporter / Third Reporter / Keysha Sosa (voice...

Dale Wilson
Jim Riggleman / Jeff Pentland / Sports Anchor / First Reporter (voice)

Sammy Sosa
Self (archive footage)

Tarik Batal
Additional Voices (voice)

Doron Bell
Additional Voices (voice)