Ackley was released by the Mariners on Tuesday, Shannon Drayer of 710 ESPN Seattle reports.
Ackley signed a minor-league contract with the Mariners on Wednesday, Jon Heyman of FancredSports.com reports.
Ackley signed a minor-league contract with the Angels on Wednesday, Mark Feinsand of MLB.com reports.
Ackley (shoulder) went 1-for-4 with two runs, one RBI and one strikeout in the first game of the season for Triple-A Salt Lake.
Ackley (shoulder) was reassigned to the Angels' minor league camp on Friday.
Ackley (shoulder) is expected to be assigned to Triple-A Salt Lake shortly after the regular season begins, Pedro Moura of the Los Angeles Times reports.
Ackley (shoulder) will serve as the DH and bat sixth in the order in Wednesday's split-squad game against the Mariners.
Ackley (shoulder) played in a B game Thursday as the designated hitter, Jeff Fletcher of the Orange County Register reports.
Ackley (shoulder) has begun taking part in light throwing and batting practice, Jeff Fletcher of the Orange County Register reports.
Ackley (shoulder) has not yet been cleared to throw in spring training, but he has started taking ground balls, Pedro Moura of the Los Angeles Times reports.