The Cleveland Indians said they'll shut down lefty reliever Andrew Miller from throwing for the next five to seven days after a follow-up medical exam revealed that he has tendinitis in his right knee.
The team said a more definitive time frame for Miller's return will be established once he resumes a throwing program.
"I think we've got a good grasp on it," Miller told reporters on Friday. "It takes a little bit of time, but we know what we are going after now."
The Indians placed Miller on the 10-day disabled list after Monday's 5-4 win over the Boston Red Sox. Miller threw only seven pitches before walking off the mound in discomfort and heading to the clubhouse. It was his second trip to the DL this month with the same injury.
Miller was making his second appearance since being activated from the DL last Friday. He was originally sidelined from Aug. 2 to 18.
"I want to get back when I'm ready because I know that's when I can help," Miller said. "I think with what I deal with, when I have the pain, it's difficult to compete at the point where I can help the team. I need to get it right. We have time where we will be able to get things to where we want them to be."
Miller, the MVP of the 2016 American League Championship Series and a dominant figure in Cleveland's run to the World Series, is 4-3 with a 1.65 ERA in 48 appearances this season. He has a 0.78 WHIP and 79 strikeouts in 54 innings.
The Indians also made a roster move Friday, recalling left-handed pitcher Ryan Merritt from Triple-A Columbus and optioning right-hander Shawn Armstrong to Columbus.
Information from The Associated Press contributed to this report.