New York Magazine: Leitch: The Glass Arm

And yet, for all the increased importance of pitching, pitchers are getting hurt more often than they used to. In 2011, according to research by FanGraphs.com, pitchers spent a total of 14,926 days on the disabled list. In 1999, that number was 13,129. No one is sure why this is happening, or what to do about it, but what is certain is that teams are trying desperately to divine answers to those questions. Figuring out which pitchers are least likely to get hurt and helping pitchers keep from getting hurt is the game’s next big mystery to solve, the next market inefficiency to be exploited. The modern baseball industry is brilliant at projecting what players will do on the field. The next task is solving the riddle of how to keep them on it.

Orioles director of pitching development Rick Peterson’s “string” theory of pitching down in the zone

So that string across home plate on Monday? Aim for it.

“What you’re trying to present to the guys is that these are outcome numbers, but if we follow this process and pound the bottom of the strike zone, [the average is] .193,” Peterson said. “And that’s the major league data. What do you think it is in the minor leagues. I don’t have the numbers, but I would think its .125 or .150.”

Every Pitch Is Bad For You | FanGraphs Baseball

The best way to keep your pitchers from getting hurt is to not pitch them. Bring on the Iron Mikes!!

The Orioles — and to some extent, the Royals — have sworn off the cutter. Now it looks like the Red Sox are eschewing the slider. The curveball is probably bad for you. If you throw the changeup one way, you might be at risk for injury. We’re years ahead of a stream of knuckleball copycats, and there’s only one screwball pitcher in the big leagues. Maybe one day we’ll find those pitches lead to injury, too.

Maybe using any pitch too much is a problem?