Astros left-hander Dallas Keuchel was slated to start Friday when Houston opens a three-game series at Texas, but manager A.J. Hinch announced Wednesday that Keuchel's next start would be pushed back a day or two.
"This time of season, all of our guys deal with fatigue, and Dallas is going through a little thing here where he's got a little bit of fatigue that we'd like to give him an extra day," Hinch said, according to the Houston Chronicle.
Right-hander Doug Fister will start in Keuchel's place. Hinch said the move also keeps Fister on a regular rotation.
Keuchel, the reigning American League Cy Young Award winner, had a rebound month in August, going 3-1 with a 3.10 ERA, but he cited lingering soreness as a reason for pushing back his start.
"It's nothing major. Just a little more rest than usual," Keuchel said. "I've been a little more sore than usual, and with the off day, we can keep the rotation the same so it really works out better than I had hoped."
Keuchel is likely to start for the Astros on either Saturday or Sunday, with rookieJoe Musgroveset to take the other start.
The Associated Press contributed to this report.