The 26-year-old right-hander, who began the season on the disabled list with shoulder inflammation, is scheduled to make back-to-back appearances for Class A Inland Empire on Friday and Saturday. If that goes well, he may be activated.
"I think his stuff is definitely picking up," Angels manager Mike Scioscia said. "I think he's recovering well, so we'll be able to look at him and see where he is in the next couple outings."
Cassevah, who posted a 2.72 ERA in 30 appearances last year, has given up just one run -- on a homer on Tuesday -- on four hits and two walks in five one-inning appearances for the Inland Empire 66ers.
If activated, Cassevah would give the Angels' beleaguered bullpen a ground-ball-producing machine and would likely replace another ground-ball pitcher in rookie David Carpenter.