KANSAS CITY MO - JULY 30: Starting pitcher Sean O'Sullivan #37 of the Kansas City Royals pitches during the 1st inniing of the game against the Baltimore Orioles on July 30 2010 at Kauffman Stadium in Kansas City Missouri. (Photo by Jamie Squire/Getty Images)
The Royals acquired O’Sullivan from the Angels during the summer of 2010 in the trade that sent Alberto Callaspo to LA. The 24-year-old right-hander went on to appear in 14 games for the Royals that season, including 13 starts, posting an ERA and WHIP of 6.11 and 1.557. O’Sullivan appeared in 12 games for Kansas City in 2011, maintaining an ERA and WHIP of 7.25 and 1.783.
This season O’Sullivan has pitched solely for the Royals Triple-A affiliate. Over his 17 appearances, including five starts, he has posted an ERA and WHIP of 6.75 and 1.856.