The Angels outrighted Rosenberg to Triple-A Salt Lake on Monday.
He'll remain in the organization after going unclaimed off waivers when the Angels removed him from the 40-man roster last week to clear a spot for the newly signed Justin Garza. Rosenberg made three appearances (one start) for the Angels in 2022 but otherwise spent the majority of the season as a member of Salt Lake's rotation. In 62.2 innings for the Triple-A club, Rosenberg submitted a 3.16 ERA, 1.24 WHIP and 62:27 K:BB.