Astros right-hander Lance McCullers Jr. was reinstated from the disabled list on Monday, and the club also recalled lefty Reymin Guduan from Triple-A.
The 24-year-old will be available to pitch out of relief in Houston's series against Toronto. McCullers completed his third and final simulated game on Friday at the club's Spring Training facility in West Palm Beach, Fla.
"I felt good over the three times I was out there," McCullers said. "There were some ups and downs, but that's part of getting back into pitching shape.