Matt Cain of the Giants threw the second perfect game of the season Thursday night against the Houston Astros.

FORBES: Was Matt Cain's Perfect Game the Greatest Pitching Performance in Major League History?

Thus far, over 1, 200 athletes have become involved with VFN, including Tim Lincecum, Barry Zito, Matt Cain and Hunter Pence, all members of the World Series-bound San Francisco Giants.

FORBES: Social Sports "Fan Card" Service Snags Tim Lincecum, Brett Favre And Over 1,200 Other Athletes

There have only been 23 in the history of Major League Baseball, including three last year by Philip Humber (Chicago White Sox), Matt Cain (San Francisco Giants), and Felix Hernandez (Seattle Mariners).

CNN: 'MLB2K13', David Price and the quest for the perfect game