O'Shea, a 25-year-old who pitched at Single-A Frederick last season, was pulled over at 4:23 Wednesday afternoon on Ocean Drive -- the main route through Siesta Key -- for a seat-belt violation.
Twenty-one minutes after the stop, O'Shea was administered two Breathalyzer tests, which registered blood alcohol levels of .074 and .072, the affidavit said. Florida's legal limit is .08
Another Orioles minor leaguer, pitcher Clayton Schrader, was in the passenger seat. He was not cited.
In a questionnaire given to those arrested on suspicion of DUI, O'Shea later admitted he was drinking, saying he had three beers. At the time of his arrest, he said he was driving from the Siesta beach parking lot to a friend's house. He also said he spent the morning "playing baseball" at Twin Lakes Park. He listed the Orioles as his employer.
O'Shea, a 27th-round selection in 2008 by the Orioles, was 3-6 with a 3.09 ERA in 25 games (eight starts) at Frederick last season. He owns a career 20-23 record with a 3.53 ERA in 94 career appearances over four years.