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Entries in oakland athletics (22)

Sunday
Dec112011

Cahill and K's

The Arizona Diamondbacks fortified their rotation over the weekend, acquiring Trevor Cahill (and reliever Craig Breslow) from the Oakland A's for a trio of prospects: RHPs Jarrod Parker and Ryan Cook and OF Collin Cowgill.

Parker is nearly big league-ready and has big upside, having returned from Tommy John surgery to post a 112/55 K/BB ratio in 130.2 innings at Double-A Mobile and then impressing enough in a late-season cameo to earn a postseason roster spot.  Diamondbacks GM Kevin Towers says the club is in "go-for-it mode," taking advantage of a window to retain top status in the NL West. However, Towers is no doubt aware that Cahill -- signed through 2015 for a little under $29 million, with team options for 2016-2017 worth a combined $26.5 million -- is a long-term buy with remaining upside.

Cahill (24 in March) has been a slightly above league-average starter to this point in his career, sporting a modest strikeout rate (5.5 K/9), average control (3.3 BB/9) and strong ground ball tendencies (54%). But the right-hander, who whiffed nearly 10 batters per nine innings as a prospect, is starting to miss more bats in the big leagues. He struck out just 11.6% of hitters faced as a rookie in 2009, but he increased that total to 15.1% in 2010 and fanned 16.3% of batters faced in 2011 (the average for starters is 17-18%).

He's getting more Ks by incorporating his breaking pitches more often. Cahill threw his his-70s curveball and his short-breaking, low-80s slider just 10 percent of the time as a rookie. As a sophomore, he threw his breaking stuff 15 percent, and he tossed a curve or slider 19 percent in 2011. Cahill is progressively doing a better job of keeping those breaking balls down, and hitters are swinging over his low curves and sliders.

In 2009, Cahill caught the middle part of the plate often with his curve and slider:

Location of Cahill's curveball and slider, 2009

Fifty percent of his breaking balls were located low in the zone, 29 percent were thrown to the middle portion, and 21 percent were thrown high. Hitters just about never missed those middle and high breakers:

Opponent contact rate by pitch location vs. Cahill's curveball and slider, 2009

Hitters swung and missed at Cahill's curve just 22 percent of the time overall, well below the 28 percent average for starting pitchers. In 2010, Cahill did a bit better in keeping the ball down:

Cahill's curveball and slider location, 2010

He threw 52 percent of his breaking pitches low in the zone, 27 percent to the middle, and 21 percent high in the zone. Those curves and sliders spotted low in the zone induced lots of whiffs:

Opponent contact rate by pitch location vs. Cahill's curveball and slider, 2010

Opponents missed 35 percent of the time they swung at a Cahill breaker. This past season, Cahill very rarely hung a curve or slider:

Cahill's curveball and slider location, 2011

Cahill threw 58 percent of his breaking balls low, 22 percent to the middle of the zone, and 20 percent to the upper third of the zone. Those breaking pitches thrown to the arm side gave hitters fits, and Cahill slightly increased his miss rate with his curve and slider to 36 percent:

Opponent contact rate by pitch location vs. Cahill's curveball and slider, 2011

At worst, the Diamondbacks picked up a young, cost-controlled starter who has gradually increased his workload to 200+ innings and will complement Dan Hudson and Ian Kennedy nicely. But, with Cahill becoming increasingly comfortable using breaking pitches in addition to his quality sinker and changeup, he could yet take a leap forward and become a number two or fringe number one starter. Some think Parker has that upside, too. Still, considering that the D-Backs have an absurd amount of pitching prospects in the pipeline -- Trevor Bauer, Archie Bradley and Tyler Skaggs to name a few -- picking up Cahill is a solid move that improves the team in 2012 and beyond.

Friday
Sep302011

Which Pitchers were Squeezed the most in 2011?

The league averaged about 78.8% of called strikes within the PitchFX defined zone.  While this may seem extremely low, many of the missed called strikes that contribute to this percentage are borderline strikes on the edges of the zone.  Still, it is somewhat disconcerting that some pitchers are getting less that 75% of the calls within the zone.

Josh Outman has had it worse than any other pitcher this season, receiving only 66.7% of the calls within the strike zone. 

Josh Outman Called Balls within the Strike Zone, 2011

Granted, Outman has only faced 254 batters in 2011, bouncing between starter and reliever for the A's towards the end of the season.  Still, in nearly 50 of those 254 plate appearances, Outman has been the recipient of at least one missed strike call by the umpire.

We'll take a look at which pitchers in 2011 received the most called strikes out of the strike zone next....

Thursday
Aug112011

Matsui Godzilla Again

Hideki Matsui of the Oakland Athletics found his stroke after the all-star break.   After a 4 for 6 on Thursday, he's hitting .432 after a .209 first half.  His pitch selection improved, as you can see in his swing rate.

Early in the season, Matsui seemed to chase pitches up and in:

Hideki Matsui, swing rate, 1st half of 2011.Note how his swing zone is vertical, as if pitchers were working him up the ladder.  The up and in area of the strike zone indicates he was swinging at pitches that were jamming him.  He wasn't making great contact:

Hideki Matsui, contact rate, 1st half of 2011.When he swung at pitches in the middle of the zone, he often missed them.

His swing selection became more horizontal in the second half:

Hideki Matsui, swing rate, 2nd half of 2011.He's now picking a level, and staying in that zone, rather than following pitches up.  His contact rate improved:

Hideki Matsui, contact rate, 2nd half of 2011.He was missing on 18% of his swings before the All-Star break, only 10% after.  Matsui swings at better pitches, makes better contact, and his batting average is reaping the benefits.

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