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This site utilizes the MLB analytics platform powered by TruMedia Networks


Foot Hunter

Over the last three seasons, A.J. Burnett led the major leagues in hitting batters with 38.  Twenty one of those came against left-handed batters and in a interesting place.  Most of the time, batters get hit up:

Left-handed batters hit by pitch, 2008-2010.A.J. hits them low:

A.J. Burnett hitting left-handed batters, 2008-2010.Those pitches around the ankle represent his curve ball getting away from him.  Look how that curve moves:

A.J. Burnett, cuveball movement, 2008-2010.Even though the movement is pretty consistent, the pitch occasionally does get more down and in than it should.  If given the choice, hitters would rather get hit low than up high.  It's also fairly clear that most of these are not intentional, as 13 of the 21 left-handers hit were batting with two strikes on them.


Up in the Zone with Chipper Jones

In his latest blog entry, Buster Olney writes about the two veteran hitters, Jim Thome and Chipper Jones.  While both have seen an expected decline in performance in their late thirties, Jones has had his share of trouble with pitches up in the zone recently.

Chipper Jones Contact% (click to enlarge)

In the highlighted zone, Jones' K-rate was 18.6%, 21.1%, and 31.9% in each successive year.


Ubaldo Jimenez: What Went Wrong? (Part 3)

In the previous post on Ubaldo Jimenez, we noted that his slider was getting hit harder by RHB in the second half of the season.  Not unrelated, he was striking out fewer RHB on the pitch as well.

Before we focus on just his slider versus RHB, let's compare his expected numbers on the pitch for all batters, which factor in all sliders thrown:

Ubaldo Jimenez Sliders vs. All Batters, 2010
First Half251.
Second Half262.203.314.289.28812.9%31.8%

We don't see much difference between his expected numbers from the two halves of the season. His actual line on the pitch went from .130/.259/.174 to .262/.340/.333. The fact that his expected line remained stable while his actual line jumped a bit tells us that he was having trouble using his slider as an out pitch. When we isolate RHB, we see where he had the most trouble.

Ubaldo Jimenez Sliders vs. RHB, 2010
First Half180.
Second Half180.218.322.306.29811.9%29.6%

Again, we see that his slider was fairly effective throughout the season in setting up his other pitches to RHB. But compare this to his numbers on decisive pitches:

Ubaldo Jimenez Sliders vs. RHB, 2010
First Half180.
Second Half180.313.389.406.37511.1%19.4%

Jimenez was having trouble putting RHB away with his slider in the second half as his k-rate dropped while opponents batting average and slugging increased. What's perplexing his how his location of the pitch changed in the second half.

Ubaldo Jimenez Sliders vs. RHB, 2010 (click to enlarge)

In the first half of the season, Ubaldo's slider was over the plate frequently. He apparently got away with this. However, in the second half, he kept the ball away and it got hammered. The only explanation I can think of is that righty batters were fooled more often in the first half and began to adjust in the second. Jimenez tried to keep the slider away, however batters seemed to recognize it easier. There is some evidence to support this as RHB swung and missed at his slider 36.2% in the first half. However, in the second half, that number dropped to 28.6%. Right-handed batters simply recognized his slider better as the season progressed and Jimenez was unable to make the proper adjustments.