24 cards
Babe Ruth
Sapphire
Chipper Jones
Sapphire
Cal Ripken Jr.
Sapphire
Derek Jeter
Sapphire
Greg Maddux
Sapphire
Hank Aaron
Sapphire
Ichiro
Ruby
Johnny Bench
Sapphire
Ken Griffey Jr.
Sapphire
Kirby Puckett
Sapphire
Mark McGwire
Sapphire
Mariano Rivera
Ruby
Mike Piazza
Ruby
Nolan Ryan
Sapphire
Pee Wee Reese
Sapphire
Roberto Clemente
Sapphire
Rickey Henderson
Ruby
Reggie Jackson
Sapphire
Tony Gwynn
Ruby
Thurman Munson
Sapphire
Willie Mays
Sapphire
Willie McCovey
Ruby
Willie Stargell
Sapphire
Yogi Berra
Sapphire
One entry per Base card — open a card to see all of its parallels. List 20 parallels and variants individually