Perez will report to the Storm Chasers on an injury rehabilitation assignment for their Thursday night game against Round Rock.
"We want to get him back to playing nine innings," manager Ned Yost said. "He caught seven innings yesterday [in Arizona extended camp] with four at-bats. We don't know how long it'll be. It won't be another month, I can tell you that."
When Perez underwent surgery on March 16, he was expected to be out until the All-Star break. But even if he spends his entire 20-day rehab allotment with Omaha, he'd return by June 27.
"He's not going to be an everyday player when he first gets here, because we've got to work him back into that everyday routine," Yost said. "But I imagine he can catch four days a week when he first gets here and we're trying to prepare him for that schedule."
Perez, who has been in Arizona since May 20, has not yet caught on back-to-back days, according to Yost.
He'll be joined in rehab by second baseman Chris Getz (bruised rib cage) and pitcher Everett Teaford (abdominal strain) at Omaha on Thursday. Pitcher Jonathan Sanchez (biceps tendinitis) is already there, awaiting his third start. Yet to be assigned are catcher Manny Pina (knee surgery) and center fielder Lorenzo Cain (hip flexor strain).