ANAHEIM -- As conversation in Mike Scioscia's office before Wednesday's game against the Cleveland Indians turned to Sean O'Sullivan's no-hitter for Triple-A Salt Lake on Tuesday, the Angels manager had an interesting take on the feat.

"He walked a guy, and we are a little disappointed in that," Scisocia joked. "We are going to monitor that closely.

"He let a guy on base, and we aren't happy about it."

In the game, O'Sullivan retired the first 18 batters he faced before issuing a leadoff walk in the seventh inning, the only player on the opposing team to reach base.

All joking aside, O'Sullivan's no-hitter brought to light the ongoing battle for the Angels' No. 5 spot in the rotation between O'Sullivan and Matt Palmer. Scioscia however, doesn't need a fifth starter until Aug. 8 with off-days on July 30 and Aug. 3.

"We have some options with days off and if we do add a fifth guy," Scioscia said, "we could give our guys a few extra days, and it is something we will consider.

"We will take a look and see what direction we want to go in if we add a fifth guy."

Following O'Sullivan's no-hitter, Scioscia said Angels pitching coach Mike Butcher talked to the Angels' Triple-A pitching coach, Erik Bennett, getting brought up to speed.

When O'Sullivan has been up with the Angels during the 2009 season, the Halos have continued to win. The team won all five games O'Sullivan started this season, with the righty holding a record of 3-0 with a 3.72 ERA.

Scioscia has been impressed with the 21-year-old's trust in his stuff.

"He competes, and he wins," Scioscia said. "He has a heavy fastball. His velocity is sneaky. He has a good breaking ball and changeup, but he puts pitches together well, and he is a great competitor.

"When he has had the opportunity, he has pitched well and is ready for the challenge."

O'Sullivan's poise and competitive nature has also made Scioscia draw comparisons to another poised Angels righty, John Lackey.

"They have a very similar makeup," Scioscia said. "They both have an internal confidence that anyone who wants a chance at success has to have inside them."