2015 Topps Stepping Up Complete Mint Insert Set with Sandy Koufax, Mariano Rivera, Albert Pujols, Jacob deGrom plus
This is the 2015 Topps Stepping Up Complete Mint 20 Card Insert Set, it was never issued in factory form. Loaded with past, present and future stars including Reggie Jackson, Duke Snider, Sandy Koufax, Johnny Podres, David Ortiz, Mariano Rivera, Miguel Cabrera, Joey Votto, Adrian Gonzalez, Randy Johnson, Madison Bumgarner, Albert Pujols, Ryan Howard, Hunter Pence, Luis Gonzalez, Mookie Wilson, Fernando Valenzuela, Corey Kluber, Joe Panik and Jacob deGrom.