"Vance Worley is a solid, dependable Major League pitcher with good control," Orioles executive vice president Dan Duquette wrote in a text to MLB.com. "Good fielder, keeps the ball down and in the park."
Worley is 31-28 with a 3.79 ERA 104 career games (81 starts) for the Phillies, Twins and Pirates.
Rondon, 27, posted a 13.19 ERA in 10 games between the Orioles and Rockies in 2015.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.