Baseball cards of the "Seinfeld" and "Curb Your Enthusiasm" creator have become popular on the secondary market.

Topps’ debut patch cards, which are autographed and contain a patch from the player’s jersey for his debut, have become popular with major leaguers and longtime collectors.

Expanding on the success of the MLB Debut Patch, Topps, MLB and Nike have partnered to recognize baseball's elite performers ...

However, the Red Sox legend didn't seem to have any regrets about trading away some of his rare baseball cards of Yankees superstars in exchange for some common ones, including one of his own.