He stays in the organization after being placed on waivers as he was not claimed by any other organization. Due to that, he was sent outright to Omaha where he’ll likely be apart of the Storm Chasers rotation.
O’Sullivan did well enough in spring, covering 15 innings and giving up six runs. He struck out six and walked just two. In 2011, he made 12 appearances and 10 starts for Kansas City and over 58.1 innings put up a 7.25 ERA. For Omaha last year, he pitched 74.2 innings and had a 4.22 ERA. He has a career ERA of 6.18 in the majors over 198 innings.
The Royals played with the timing of his assignment to maintain some depth. Earlier in spring another team may have at least looked at him, but later on, as other teams have their rosters more or less pieced together, they won’t usually make another move. O’Sullivan hasn’t had a great track record, but he’s just 24 years old and has shown decent control in the minors. It’s not going to hurt much at this stage to have him around for depth, although he’s pretty likely to stick around Omaha unless injuries dictate he get called up.