Mikey O'Brien was dominant for Class A Advanced Frederick on Thursday night, tossing a seven-inning no-hitter as the Keys took down Lynchburg, 2-0.
The 5-foot-11 right-hander struck out nine batters, which tied his career-high, while allowing just one walk as he breezed through seven frames. He has not surrendered an earned run in his past three starts, a total of 19 1/3 innings. Thursday's performance puts him at 3-4 with 1.76 ERA in 10 appearances for Frederick.
O'Brien was a ninth-round Draft pick by the Yankees out of high school in 2008, and spent time with in several farm systems -- most recently Tampa Bay this season -- before the O's signed him on May 31.
Before his big game Thursday, Nathan Moreau tossed the Keys' most recent no-no on June 30, 2010.
Alex M. Smith is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.