The Angels released Rosenberg on Monday.
Rosenberg was called up from Triple-A Salt Lake on Monday.
The Angels optioned Rosenberg to Triple-A Salt Lake on Wednesday.
Rosenberg allowed one run on two hits and two walks while striking out four batters over five innings in long relief against Toronto on Tuesday.
The Angels recalled Rosenberg from Triple-A Salt Lake on Tuesday.
The Angels optioned Rosenberg to Triple-A Salt Lake on Friday.
Rosenberg (0-1) took the loss against the Athletics on Thursday, allowing six runs on six hits and one walk over 3.1 innings while striking out one.
Rosenberg will start Thursday's game versus the Athletics, Jeff Fletcher of The Orange County Register reports.
Rosenberg pitched in long relief against Seattle on Thursday, allowing six runs on eight hits and three walks while striking out four batters over six innings.
The Angels recalled Rosenberg from Triple-A Salt Lake on Wednesday.