Inspired by the excellent Red Sox blog Over the Monster, today I’m going to take a look at which Yankees starting pitchers throws the “best” pitch among each pitch category. As there are a variety of factors involved in determining a given pitch’s overall effectiveness, “best” in this instance is going to be subjective. In the interest of simplicity, I’m ranking the hurlers by their respective Whiff rates, as the ability to generate a swing-and-miss is probably the most transparent indication of pure stuff.
All of the data in the tables you’ll see below is from the 2011 season, and should be mostly self-explanatory. I’ll be the first to admit that a one-year sample is less-than-ideal, but I tried to run a three-year search and TexasLeaguers.com didn’t take to that request too kindly. The columns headed by “w” and “w/100″ are the pitch type’s linear weights (representing the total runs that a pitcher has saved using that pitch) and linear weights per 100 pitches (the amount of runs that pitcher saved with their fastball over the course of 100 fastballs thrown), which provide some level of insight into a pitch’s relative level of effectiveness but should not be analyzed in isolation, as they are subject to the whims of both sequencing and BABIP.
And right off the bat we have a prime example of the problems one can encounter with pitch type linear weights. If you sorted this table by wFF, Phil Hughes would come out on top. How on earth is that possible, you are likely asking yourself. I’m not entirely sure myself, as I don’t think anyone that saw Hughes pitch last year thought much of his fastball. However, he did get some people out, and presumably the vast majority of those outs came via his four-seamer, because, as you’ll see later on in this post, everything else he threw last season was pretty awful, at least by pitch type linear weights. Lending further credence to this notion is the fact that Hughes yielded a .282 BABIP on ground balls on his heater, compared to a .360 BABIP on ground balls on the curve, .444 on the cutter and .556 on his changeup.
As far as Whiff% goes, it should be quite heartening to see that the Yankees’ two newest rotation acquisitions outperformed everyone else in the rotation by a rather substantial margin. While both will likely see a decrease in their Whiff rates with the move to the AL East, at least they’re starting from a high baseline.
We know Ivan Nova threw a slider more than 3.9% of the time last season and so this table is a bit misleading. However, the pitch did become one of the keys to his improved second-half performance, and so there may be a case to be made for Nova having one of the better sliders on the team. Of course, Michael Pineda and CC Sabathia might have something to say about that. In any event, the Yankees’ front four in the rotation all boast pretty big-time sliders; bad news for opposing lineups.
While Pineda probably threw some two-seamers last season, I’d surmise that some of his four-seamers may have been misclassified, as a 10.6% Whiff% rate on a two-seamer/sinker is pretty damn high when you consider league average is 5.0%-5.4%. Not to mention the fact that the player with the best wFT/100 in MLB last season (Doug Fister), had a 5.4% Whiff% on his two-seamer. Sabathia probably has the best sinker on the team, although Kuroda is in that conversation as well if he can get his GB% back above 45%.
It should surprise no one that Sweaty Freddy had the best changeup on the team given his slow-slower-slowest approach, although Sabathia’s is also pretty great. No one else in the rotation has a particularly effective one, although Burnett’s did generate a slightly above-average Whiff% last year. Surprisingly, despite a rather diverse arsenal, Hiroki Kuroda is the only starter on the team that doesn’t throw a change at all. However, in his case he presumably partially makes up for it with his splitter, which can function like a hard change.
No surprises here; Burnett’s curve is the only thing keeping him away from the glue factory, but as everyone knows you can’t get very far with one working pitch. Nova’s curve is probably best described as a work-in-progress; while there were times in the second half that Phil Hughes looked like he was employing a harder (and more effective) curve and other times where his curve looked terrible. Stop me if you’ve heard the one about Hughes needing to improve his curveball to become an effective Major League starter.
The splitter is a fun pitch that Yankee fans don’t get to see too often, and this coming season we may have two members of the rotation featuring one (albeit in very different forms). Prior to Freddy Garcia, the last Yankee starter I can think of off the top of my head that threw one is Roger Clemens (Ed. Note: Jose Contreras threw a forkball, which is kinda like a splitter but slower). Per linear weights, neither Freddy nor Kuroda fared all that well with their splitters last season, but they still generated plenty of whiffs with the pitch.
So who boasts the best pitch in the Yankee rotation? Probably either Sabathia, with his heater or slider, or Pineda and his heater. I certainly wouldn’t argue against any of those three.