Originally Posted by Falstaff
Hi. Muscles attach to tendons. Ask Roger Clemons what happens when you make the muscles stronger faster than the tendons (as with PEDS). Remeber 2005? He blew out leg tendon for this reason.
Ligaments attach one bone to the other at joints. They take hella strain too.
Best plan would be for Sale to use liberal Ben-Gay or Oil O'Wintergreen and get the juices pumping before each start. And work on the off-speedo junk, like forkball, knuckle-curve, sloshball to gain command of low speed low stress ways to get hitters out. When you try to throw 97mph all the time, it gets to be more like 91.
Sale is also only 23 and still growing. I would think trying to put on a few pounds and strengthen himself is a better course than learning junkballs at this point.