Skaggs, 26, is 6-5 with a 2.64 ERA in 16 starts this season. He has stuck out 100 batters in 92 innings pitched.
The Angels activated another member of the starting rotation Wednesday, however, as right-hander Garrett Richards was reinstated from the disabled list. He is scheduled to start Wednesday's game against the Mariners. The 30-year-old Richards, who is 4-4 with a 3.42 ERA in 14 starts, had been sidelined since the middle of last month with a left hamstring strain.
The Angels also placed outfielder Chris Young on the 10-day DL on Tuesday and optioned utilityman Kaleb Cowart to Triple-A Salt Lake. The team recalled outfielder Jabari Blash and right-hander Deck McGuire from Salt Lake in corresponding moves.