I am not defending it, but his motivation is pretty obvious. The Mets stink and are going nowhere. He already has his money, and if he is to stick around with a bad team for the rest of the season, he wants teh extension to 'make it worth his while.' Alternatively, the Mets release him, and he potentially has an opportunity to sign with a contender for the stretch run. Not defensing the tactic, but its really a no risk maneuver on his part. As this thread demonstrates, his reputation is already garbage, and the results will be he gets the rest of the summer off, taking no financial hit, or he goes and signs with a contender.