Cleveland is hopeful that Sizemore will be ready at some point in September.
"He's doing well," Lonnie Soloff, the Indians' head athletic trainer, said on Tuesday at U.S. Cellular Field. "We're just pleased that he's progressed as well as he has to this point."
Soloff indicated that Sizemore, who has been bothered by a right knee issue and also underwent sports hernia surgery on July 21, has resumed playing catch and hitting baseballs off a tee. Soloff added that Sizemore headed to the Cleveland Cavaliers' facility in Independence, Ohio, on Tuesday to run on an anti-gravity treadmill.
The Indians have the same specialized piece of equipment at their Spring Training base in Goodyear, Ariz. The unique treadmill allows the runner to simulate running at different body weights. On Tuesday, Sizemore (listed at 200 pounds) ran at 80 percent of his body weight, or a simulation of 160 pounds.
The treadmill reduces stress on a runner's legs. Soloff said that Sizemore would run on the same machine on Thursday, but would likely progress to "land-based" running drills by the time the Indians return from their current six-day road trip through Chicago and Detroit.
"He's progressing to baseball stuff, but he's taking it slow," Indians manager Manny Acta said. "He's got to finish that sports hernia rehab and the knee is just going along. Rest is what's going to take care of the knee anyways."