Why? He looks like he's in pretty good shape to me.
II'd like to take credit for the following but:
Newton's second of motion defines force as the product of mass times ACCELERATION ( vs. velocity ) . Since velocity is the change in velocity divided by time, you can connect the two concepts with the following relationship:
force = mass x ( velocity / time ) = ( mass x velocity ) / time = momentum / time
Multiplying both sides of this equation by time:
force x time = momentum
Newton's 2nd law tells that force = mass x acceleration ( F = ma ) Since acceleration is just how velocity changes over time,, we can write this as
F = m * v/t
Multiply both sides by time to arrive at
F t = m v
Since mv is momentum, we can see that the momentum conferred to an object by a force equals the force times the time the force is applied.
http://www.physlink....perts/ae462.cfm
Anyway, I know a little about pitching and you're right he's in very good shape but at 185 lbs. adding just an additional 10 pounds to his lower body would go a long way to preventative maintenance. With a physique such as he has I would think he could add 10 lbs. of muscle quite easily to his legs and that will only benefit him as he gets older.