Peralta will be followed in order by Jimmy Nelson and Matt Garza against the Giants, then Taylor Jungmann and Chase Anderson in the subsequent series against the Astros.
"In 2014, Wily had a big season. I think last year, a number of things happened that didn't allow him to perform the way we expect him to perform," Counsell said. "I think he's more than capable of getting back to the level he was in 2014. He's really primed and in the sweet spot to get back to that level."
Peralta went 17-11 with a 3.