I think I've got it. It's a U of V ball from around 2004-2005. #2 is Kyle Werman, #6 is Tim Henry. Check the autos numbered on the ball, those sigs are a dead match for those names. So I think you DO have a Ryan Zimmerman, just a really early one.
Good call Mark, he has obviously changed his sig since college.
2005 Team Roster:
http://www.thebaseballcube.com/teams...Y=2005&T=20194