Riggleman makes the lineup card, and Morse is rehabbing.  No one is being held prisoner.  I will agree that Taveras being in the starting lineup is embarrassing though.

I can understand Guzman. Riggleman just misuses him. Put him in a position to succeed and he will. Taveras will never succeed. If I was the manager, this is my lineup:

Guzman RF
Desmond SS
Zim 3B
Dunn 1B
Hammer LF
Pudge C
Gonzalez 2B
Morgan CF
Olsen P

He would never do it because he is in love with stroking everyone's ego.