I put it to the Twitter community. Their replies:
Chaz: I don't think that player is on the roster. Remains to been seen if this front office will give long-term deals to starting pitchers.
DMC2: I go with either Ken Caminiti or Steve Finley.
BParker: Rob Johnson should have his number retired for Mendoza Line excellence.
Bodie: Austin Hedges in 2036.
Jeff: Good question. The only one I can come up with is Cameron Maybin.
sdnick: Maybin? (Chase) Headley?
copperblue99: Not Adrian Gonzalez.
Duane: If Garvey's is retired, you would think it's possible Adrian's might.