He never showed pop during his charade with the Mets. He sucked from day one. Not quite Michael Jordan bad, but damn close.
He's not trying to elongate his career. He is selfishly blocking others' opportunities because he craves the attention and is getting paid to generate buzz for the team (Mets and Jags).
I think most former players have more pride than that and know when it's over/when to give others a chance to make their mark.
He's not a long shot. He's a no shot. Everyone, including him and Urban Meyer, knows that.