He didn't have to wait long to land a full-time spot with the club, as Astros manager Bo Porter tabbed Cosart as Houston's fifth starter exiting the All-Star break and said the righty will be called up Tuesday and start against Oakland that night.
Cosart carried a no-hitter into the seventh inning in Tampa on July 10 and gave up only three walks and two hits, beating reigning Cy Young winner David Price in a 2-1 pitchers' duel.
"We just want him to continue to pitch," Porter said. "We all know the talent he has. It's a big arm. It's a guy who has tremendous stuff. I said this even after the last start. People wanted to compare Jarred Cosart to different people.
"I said, 'Let's allow Jarred Cosart to be Jarred Cosart.' Over time he'll be able to answer all of those questions. But there will be no undue pressure placed on him. He's going to be one of five guys that will get the ball once every five days."
The hard-tossing righty was 7-4 with Triple-A Oklahoma City with a 3.29 ERA and earning the nod as the Triple-A All-Star Game starter for the Pacific Coast League.
Cosart's promotion comes on the heels of Lucas Harrell's demotion to the bullpen and allows Houston to split its two lefties up in the rotation.
Tuesday's start will mark the home debut for Cosart, a Clear Creek High alumnus and League City, Texas native.
Chris Abshire is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.