Padres signed RHP Sean O'Sullivan to a minor league contract.

The deal includes a spring training invite. The 26-year-old had a 3.83 ERA over 115 innings this past season at the Triple-A level. O'Sullivan's problems begin when he's asked to take to a major league hill, where he's been taxed with a 5.89 ERA over 50 career appearances (37 starts). He'll need a big spring to win a roster spot.

Padres sent RHP Sean O'Sullivan outright to Triple-A Tucson.

O'Sullivan was designated for assignment earlier this week, but he'll wind up sticking around. He holds a 3.96 ERA and 1.80 WHIP over 25 big league innings this season.

Padres designated RHP Sean O'Sullivan for assignment.

The move clears a spot for Brad Boxberger on the active roster. O'Sullivan has a 3.96 ERA in three starts and four relief appearances this season, despite a lousy 12/14 K/BB ratio in 25 innings.

Padres activated RHP Sean O'Sullivan from the paternity leave list.

O'Sullivan was out for just two days. He has a 3.71 ERA through 19 1/3 innings this season with San Diego.

Padres placed RHP Sean O'Sullivan on paternity leave.

O'Sullivan won't miss a start, as he twirled six innings of one-run ball in Monday's victory against the Reds. He'll be back in a few days.

Sean O'Sullivan allowed three runs -- two earned -- over 6 1/3 innings in a loss to the Brewers on Wednesday.

O'Sullivan surrendered seven hits and three walks but managed to limit the damage. He's pitched decently in both of his starts this year but is 0-2 with a 4.72 ERA to show for it. With Jason Marquis now out for the year after having Tommy John surgery, O'Sullivan could be in for more starts going forward.

Sean O'Sullivan will start on Wednesday in Milwaukee.

O'Sullivan pitched decently in a spot start earlier this month and will get another shot with Jason Marquis (elbow) on the shelf. He can be avoided for fantasy purposes.

Sean O'Sullivan gave up two runs in five innings against the Giants in his Padres debut Friday.

O'Sullivan took the loss, but he gave the Padres a solid performance in a game they ended up losing 10-1. It's up in the air whether he'll make more starts after the All-Star break. NL-only leaguers should stay away regardless.

Padres purchased the contract of Sean O'Sullivan from Triple-A Tuscon.

O'Sullivan will make his first start of the 2013 season against the Giants on Friday, replacing Robbie Erlin in the rotation. The 25-year-old righty hasn't appeared in the big leagues since he made 10 awful starts for the Royals in 2011. Despite pitching in a favorable environment, fantasy owners should probably look elsewhere.

The Padres will call up Sean O'Sullivan from Triple-A Tucson to start on Friday against the Giants.

He'll take Robbie Erlin's spot in the rotation. O'Sullivan has posted a 3.88 ERA and 90/29 K/BB ratio over 102 innings at Tucson this season. The owner of a career 6.13 ERA and the big league level, he should be ignored for fantasy purposes.

Padres signed RHP Sean O'Sullivan to a minor league contract.

The deal includes a spring training invite. O'Sullivan, 25, had a 4.23 ERA and 70/46 K/BB ratio over 142 2/3 innings this past season in Triple-A between the Royals and Blue Jays. He has a 6.13 ERA over 43 games (34 starts) in the majors and will need a big spring to win a roster spot.

Blue Jays acquired RHP Sean O'Sullivan from Royals for cash considerations.

O'Sullivan, 24, has an ugly 6.75 ERA and 26/23 K/BB ratio over 53 1/3 innings as a starter and reliever at the Triple-A level this year and a 6.13 ERA over 193 2/3 innings in the big leagues. This move is more about adding some pitching depth at the Triple-A level, as the injury-riddled Jays have recently been forced to move a number of pitchers up to the big league level.

Sean O'Sullivan tossed five no-hit innings against the White Sox on Friday night.

O'Sullivan allowed just one baserunner via a walk in the fifth inning and struck out two. The 24-year-old right-hander is out of options and isn't expected to make the Royals' Opening Day roster, but he may have impressed a scout or two on Friday night.

Sean O'Sullivan will start Tuesday against the Twins.

The Royals opened up multiple holes in their rotation after shutting some pitchers down. Everett Teaford and Luis Mendoza have filled two of the spots, and now O'Sullivan will fill a third. He holds a 6.92 ERA and 18/26 K/BB ratio over 53 1/3 innings this season and can be ignored for fantasy purposes.

Royals recalled RHP Sean O'Sullivan from Triple-A Omaha.

O'Sullivan, 24, posted a 6.92 ERA and 18/26 K/BB ratio over 53 1/3 innings with the Royals earlier this season. He figures to pitch out of the bullpen the rest of the way and can be ignored in fantasy leagues.

Sean O'Sullivan (biceps) allowed four runs on six hits over 2 1/3 innings Wednesday in his first minor league rehab start with Triple-A Omaha.

O'Sullivan also uncorked two wild pitches, one of which allowed a run to score. The important thing is that he's feeling healthy again, but the Royals will want to see better results before activating him from the disabled list.

Sean O'Sullivan (biceps) will begin a rehab assignment with Triple-A Omaha Wednesday.

He'll probably need at least 2-3 starts before rejoining the Royals. With Bruce Chen and Kyle Davies due back before him, O'Sullivan is likely to return as a long reliever.

Sean O'Sullivan (biceps) is using his time on the disabled list to go back to his old delivery.

Bob Dutton of the Kansas City Star refers to it as a "power delivery" that O'Sullivan thinks he went away from due to an overemphasis on mechanics. "I'm so tired of mechanics," he said. "I'm so tired of trying to get in the perfect position. When I was in high school and college, I could stand at home plate and throw it over the left-field fence if I wanted to. So I started playing catch like that again. I decided I was just going to be athletic. Not try to get in the perfect position and be so robotic." O'Sullivan has liked the results in a pair of bullpen session. He'll throw a simulated game this weekend and could be ready for a rehab assignment the following weekend.

Sean O'Sullivan continued his downward spiral Thursday, allowing seven runs - three earned - on eight hits and two walks over just 2 2/3 innings in a loss to the Twins.

O'Sullivan got off to a surprisingly nice start when thrust into the Royals rotation, but he's been downright dreadful lately, allowing a whopping 30 runs - 26 earned - over his previous four outings to bloat his ERA all the way up to 6.92. Nate Adcock followed O'Sullivan with some effective innings, and he might get a shot to replace him in the rotation the next time out. If O'Sullivan gets another shot, it will come against the Blue Jays.

Sean O'Sullivan allowed 10 earned runs in 5 2/3 innings Saturday as the Royals lost to the Rangers.

Sullivan surrendered 15 hits and walked two while striking out just one. He's been shelled now in consecutive starts and can be completely avoided in fantasy leagues. Even next week against the light-hitting Twins.