Right-hander Brandon Erbe and lefty Troy Patton were reassigned to Triple-A Norfolk and right-handers Luis Lebron and Chroyre Spoone were sent to Double-A Bowie, with all four going to Minor League camp.
Erbe and Patton each threw two scoreless innings in Sunday's "B" game at Pirate City -- a 10-inning contest that ended in a 1-1 tie, and manager Dave Trembley gave the pair of young arms rave reviews.
"Erbe said he had a blast and enjoyed [big league camp]," Trembley said. "I was impressed, not so much with his stuff but with his demeanor. His demeanor on the mound was businesslike, very good body language, very good mound presence, and life on his pitches."
Erbe tossed one scoreless inning and allowed three runs on three hits against Detroit on March 6.
"I don't know if he's going to pitch [at Triple-A] or not, but he's going to pitch in the big leagues," Trembley said.
Patton yielded a run on two hits in his lone inning of work on March 5, but told Trembley that Saturday's game was the best he's felt since undergoing surgery on his left shoulder in 2008.
"With him, his arm slot's got to be the same all the time," Trembley said. "If you saw him earlier, his arm slot was dropping and the ball would leak out of the zone."
Lebron, who turned 25 on Monday, is also headed out on impressive terms. Trembley hadn't seen the hard-throwing lefty before this spring, and raved about Lebron's "Major League fastball."
The Orioles' Double-A and Triple-A squads will play their home games at Ed Smith Stadium, with Spring Training action beginning on Wednesday.
"He's going to pitch in the big leagues, too," Trembley said. "Both [Lebron and Erbe] are special -- special arms."
Armando Gabino, Chris George and Michael Hinckley were also assigned to Minor League camp, which is located at the Ed Smith Stadium complex in Sarasota.
Brittany Ghiroli is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.