Heard this from a couple of evaluators: Johan Santana's velocity is down 3-4 miles per hour from a couple of years ago. He is short-arming the ball more than he has in the past -- and this is after some red flags appeared in the physical examination he underwent before signing with the Mets. Sources say his shoulder showed some wear and tear, which is not unusual for a pitcher of Santana's age. This is not to say Santana is not an effective pitcher now, but all of this information makes you wonder how effective he will remain during the course of his multi-year deal.