The Padres will recall Perdomo to start against the A's on Wednesday in the rotation place left vacant by Jordan Lyles (elbow inflammation). Lyles has been out since June 23, but the Padres used two off-days to skip his turn in the rotation last time through.
Perdomo's season got off to a dreadful start with the big league club. He posted an 8.36 ERA in four Major League starts, allowing 26 hits in 14 innings. The 25-year-old ground-ball specialist was allowing far too much hard contact and far too many line drives.
"My mechanics, more than anything, everything was out of whack," Perdomo said. "I was leaving a lot of pitches in the middle. I wasn't able to control or command my pitches, and that's what I worked on most."
Perdomo, who arrived in Oakland on Tuesday, appears to have solved some of those issues. He missed a couple starts due to shoulder soreness, but has been strong since he returned.
"I didn't really get mad about the send-down," Perdomo said. "I took it as a chance to work. I went down there and kept doing what I need to do and took it as an opportunity to get better, and that's why I'm here."
A former Rule 5 Draft selection, Perdomo had never pitched in a Minor League game higher than Class A until this season. As a rookie in 2016, he impressed after being given a starting role in the second half.
Perdomo won a rotation spot the following spring, but he never built on that early success. He'll get another chance on Wednesday afternoon, and if he runs with it, his stay could be a prolonged one.
"We don't know how this opportunity is going to play out for him," said Padres manager Andy Green. "He could very well be here for the rest of the baseball season. That's highly possible for him. If he is, we all love that. We all believe in him. He's a guy who, when he attacks the strike zone, is very, very effective."
Yates to paternity list Right-hander Kirby Yates was placed on the paternity list Tuesday, and the Padres recalled right-hander Colten Brewer in his place.
Brewer has posted a 4.50 ERA in 27 appearances for El Paso this season. In one big league outing, he allowed four runs in two-thirds of an inning against the Giants in April.
Yates is expected to return Friday in Arizona. Until then, his presence will be sorely missed. The 31-year-old setup man is an All-Star candidate and has posted a 0.79 ERA in 34 innings this season.
Padres sign 16 internationally The Padres are still under penalty for their 2016-17 international spending spree, meaning they can't spend more than $300,000 on any individual free agent. But they were busy, nonetheless, when the signing period opened Monday.
According to MLB.com's Jesse Sanchez, the Padres inked 16 players -- nine from the Dominican Republic, six from Venezuela and one from Colombia.
For the complete list and further updates on the newly opened 2018-19 signing period, you can follow along here.