Jack Cust, Ryan Ludwick. Mike Aviles, Jeremy Guthrie, Carlos Pena, Rick Ankiel, Brendan Donnelly, Jorge Campillo, JJ Putz, and that's just from the list of currently active players and only counting all-star quality ballplayers, which is a level we really aren't expecting Brown to reach.
I believe Brown broke through this year but wasn't given a chance to prove it at the big league level because of the congestion at the catcher position. It's not a question therefore of waiting for him to get it after age 26. He got it at age 26 and it's a question of letting him prove it..