In his one game for the Mariners, Wieland took the loss in Oakland on Aug. 12 when he allowed six runs on nine hits over five innings.
The Mariners acquired Wieland from the Dodgers in January in a trade for infielder Erick Mejia. In parts of four seasons with the Padres, Dodgers and Mariners, Wieland has combined to go 1-6 with a 6.32 ERA in 12 games, including 10 starts.
Wieland is the second pitcher traded by Seattle for a player to be named or cash in the past two days. Veteran Wade LeBlanc was sent to the Pirates on Tuesday is a similar deal.
Greg Johns has covered the Mariners since 1997, and for MLB.com since 2011. Follow him on Twitter @GregJohnsMLB and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.