KANSAS CITY -- The Padres’ starting rotation will be in scramble mode for the foreseeable future with right-handers Joe Musgrove and Yu Darvish both landing on the 15-day injured list.

The Padres recalled right-hander Randy Vásquez from Triple-A El Paso ahead of Saturday's 7-3 victory over the Royals at Kauffman Stadium, and right-hander Logan Gillaspie was also recalled from the Chihuahuas to fortify the bullpen.

The Darvish move is retroactive to May 30, and Musgrove’s status is retroactive to May 29. The Darvish development had become a possibility after Darvish left his last start against Miami with left hamstring tightness. The concern surrounding Musgrove came after he felt elbow discomfort during his last side session.

“On the last pitch of Joe’s last side [session], he felt some inflammation in the back of the elbow,” manager Mike Shildt said. “He’ll continue to get imaging. We have baselines, but structurally we feel like everything is good. It’s just that the repetitiveness with the elbow is not letting him finish pitches like he needs to finish. We’ll give him another break from it and hopefully get him back sooner rather than later.”

Shildt said it’s likely the Padres will call up a pitcher to take Darvish’s scheduled Tuesday start against the Angels.

“The feedback [on Darvish] is that it’s better, but we know those [groin/hamstring] areas can be tricky,” Shildt said. “We want to make sure we get it behind him.”

Darvish was 4-3 with a 3.20 ERA over 56 1/3 innings this season, and Musgrove had pitched to a 5.66 ERA over 49 1/3 innings, but Shildt is confident his club will adjust with 40 percent of the starting rotation in temporary flux.

“We’ve had challenges already this year,” Shildt said. “The challenges are what ultimately define you.”