Mark McGwire, Tom Seaver, Randy Johnson & Fred Lynn Signed USC Trojans Jersey

What do baseball greats Tom Seaver, Randy Johnson, Mark McGwire and Fred Lynn all have in common? They are among the 89 University of South California Trojans baseball players to successfully make the leap to the Majors. Others on the list include Dave Kingman, Barry Zito, Aaron Boone and Mark Prior. What else do Seaver, Johnson, McGwire and Lynn have in common? They have each hand signed this USC Trojans jersey, which comes complete with a Steiner Sports Certificate of Authenticity.