21 Signatures: John Elway, Steve Young, John Smoltz, Joe Mauer, T.J. Oshie, Marcus Allen, Vince Carter, Joe Pavelski, Baker Mayfield, Kevin Millar, Annika Sorenstam, Devante Adams, Joe Theismann, Brian Urlacher, Ronde Barber, Jon Lester, Doug Pederson, Roger Clemens, Mike Modano, Alex Killorn and Robbie Gould