Meet Sean O'Sullivan

NEW YORK - JULY 25: Sean O'Sulliuvan #37 of the Kansas City Royals pitches against the New York Yankees on July 25 2010 at Yankee Stadium in the Bronx borough of New York City. (Photo by Al Bello/Getty Images)

All right, it is about time to get a close up look at Sean O'Sullivan.


Age 22

Height and Weight

6'2" 230 lbs – and b-ref

6'1" 222 lbs – baseball cube


He is a big boy and can use to lose a few pounds. I like to use all three sources to see if there are any dependencies. The Baseball Cube is always a little behind, so it looks like he has gotten bigger over time.




I don't like to use FIPS or ERA without knowing the exact league and park factors in the minors, so here are his K/9 and BB/9 through the minors and majors along with his MLB ground ball rate.  I combined his 2009 and 2010 major league stats are all data because of his limited time in the majors.


Season Team K/9 BB/9 GB%
2006 Angels (R) 6.94 0.88  
2007 Angels (A) 7.11 2.27  
2008 Angels (A+) 6.32 2.85  
2009 Angels (AA) 6.75 0  
2009 Angels (AAA) 6.26 2.61  
2009/10 Royals and Angels 4.91 2.58 38%


He is a much better strikeout pitcher in the minors than so far in the majors, with a fairly consistent walk rate.


Here is a breakdown of how much hitters are swinging at his pitches:


Contact Rates

Outside Swing % Outside Contact % Strike Swing % Strike Contact % Swing Strike %
19.7 72.2 42.9 97.8 5.8


Almost 98% of pitches swung at in the strike zone lead to contact.  He really has problems missing bats.




Sean throws 3 pitches and here is how often and with what success (the higher the run value the better the pitch):


% Thrown 61.5 22.9 15.5 9.3
Run Value/100 PITCHES -1.89 0.72 3.59


He doesn't have much success with his fastball, which he throws the most.


Finally, here is a look at the speeds of each pitch along with the grip I think he uses (these could be wrong, so feel free to correct me).


Fastball (ave = 90 mph)



Curve Ball (ave = 78 mph)




Change up (77mph)




Well, that is all I have for now.  Feel free to ask any question if any of the information is now clear.

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