Right-hander Jorge Rondon, who was designated for assignment last Tuesday when the Orioles claimed Vance Worley from the Pittsburgh Pirates, has been claimed by the Pirates.
It basically has become a swap of right-handed relievers through waiver claims.
Rondon, 27, pitched in eight games for the Orioles this season, allowing 11 earned runs on 20 hits and six walks in 13 1/3 innings for a 7.43 ERA.
Claimed off waivers from the Colorado Rockies in May, Rondon posted a 2.33 ERA in 30 games for the Orioles' Triple-A affiliate, the Norfolk Tides.
Also, according to Baseball America's minor league transactions page, the Orioles signed Catonsville High School graduate Adam Kolarek and re-signed infielder Corban Joseph to minor league deals.
Kolarek, a 26-year-old left-hander who was selected in the 11th round of the 2010 draft by the New York Mets, was released by that organization a few weeks ago. He was 2-4 with a 4.43 ERA in 51 games (one start) for Double-A Binghamton.
Joseph, who turns 27 Wednesday, hit .280 with six homers in 63 games while playing primarily second base with Double-A Bowie. He is the younger brother of Orioles catcher Caleb Joseph.
In other news, The Sporting News announced Monday that Texas' Prince Fielder had won its 2015 American League Comeback Player of the Year Award, which is voted on by a panel of players.
Orioles third baseman Manny Machado, who returned from knee injuries that ended his season the past two years, finished fourth in the voting. New York's Alex Rodriguez and Cleveland's Jason Kipnis were second and third, respectively.