Plesac was released by the Angels on Monday, Jeff Fletcher of The Orange County Register reports.
The Angels optioned Plesac to Triple-A Salt Lake on Saturday.
Plesac (1-1) was tagged with the loss against the Dodgers on Saturday, allowing six runs on seven hits and one walk over 3.1 innings. He struck out one.
Plesac will start Saturday's game against the Dodgers, Sam Blum of The Athletic reports.
Plesac (1-0) earned the win over Milwaukee on Monday, allowing three runs on four hits and two walks while striking out one batter over six innings.
Plesac will draw the start Monday versus the Brewers.
The Angels selected the contract of Plesac on Monday.
Plesac cleared waivers Thursday and was sent outright to Triple-A Salt Lake.
Plesac was designated for assignment by the Angels on Monday.
The Angels optioned Plesac to Triple-A Salt Lake on Saturday, Sam Blum of The Athletic reports.