Lewis, who threw an inning Sunday, will go two innings in an extended spring game Saturday. Perez will throw three innings in a game Wednesday.
Lewis could go out on a rehab assignment after Saturday's outing provided there are no setbacks, Rangers general manager Jon Daniels said Tuesday. Once he goes out, he has 30 days in the minors to rehab.
Other rehab updates:
Right-hander Neftali Feliz is throwing out to 105 feet.
Right-hander Kyle McClellan will throw a bullpen session Wednesday.
Reliever Joakim Soria, who has a strained pectoral muscle in his chest, has yet to restart a throwing program.