The Angels recalled Johnson from Triple-A Salt Lake on Monday, Jeff Fletcher of The Orange County Register reports.
The 23-year-old was optioned to the minors Friday but will quickly rejoin the Halos to fill out the roster after Monday's trade deadline. Johnson was in the starting rotation prior to his demotion and surrendered 13 runs in his past two starts. The Angels have an available rotation spot in the wake of Jose Soriano being traded to the Blue Jays, though it's unclear if Johnson will reclaim a starting role or instead work out of the bullpen.