Jason Hammel (knee) will make a minor league rehab start Saturday with High-A Frederick. He's expected to throw around 70 pitches. If all goes well, he could rejoin the Orioles' rotation on September 6, though he could pitch with Double-A Bowie if the team thinks he needs more work. Hammel has been sidelined since mid-July following knee surgery.

Jason Hammel (knee) threw about 60 pitches Monday in a simulated game. The next step calls for Hammel to begin a minor league rehab assignment Saturday with High-A Frederick. If all goes well, he could rejoin the O's rotation as soon as September 6. The 29-year-old right-hander has been sidelined for six weeks following right knee surgery.

Jason Hammel (knee) is scheduled to throw a simulated game Friday afternoon at Camden Yards. Hammel tossed a side session and took fielding practice Tuesday without feeling any sor of pain or discomfort. If his simulated game goes well, he should be cleared to begin a minor league rehab assignment early next week.

Jason Hammel (knee) threw a bullpen session Saturday. Hammel made it through 40 pitches without feeling any unexpected pain or discomfort. He will throw again Monday and could begin a minor league rehab assignment late next week. The right-hander has been on the shelf since mid-July with a right knee injury.

Jason Hammel (knee) is scheduled to throw a third bullpen session Saturday. Hammel has yet to advance beyond bullpen work, and isn't any closer to returning. His next step will involve being cleared for a rehab assignment.

Orioles manager Buck Showalter said Jason Hammel's (knee) arm was "cranky" following a bullpen session Thursday. Hammel felt fine the first time he threw from the mound, but it didn't go so well the second time. He would have been cleared to throw a simulated game if Thursday's session went well, but that seems unlikely now. It doesn't seem like more than a minor setback, though. Hammel is expected to rejoin the Orioles' rotation sometime next month.

Jason Hammel (knee) is scheduled to throw another bullpen session on Thursday afternoon. If it goes well, he should be cleared to begin facing live hitters in a simulated setting. Then it's off to a rehab assignment. Hammel is aiming to rejoin the Orioles' starting rotation at some point in September.

After throwing off the slope of the mound Saturday, Jason Hammel (knee) said he felt good and is optimistic about rejoining the O's rotation in early September. Hammel has begun to make progress in his recovery from knee surgery but still needs to get through actual mound workouts and then several rehab starts before returning to Baltimore's active roster. The right-hander has been on the shelf since the middle of July.

Jason Hammel is scheduled to throw off the slope of the mound Saturday for the first time since knee surgery. If all goes well, he'll throw from the actual rubber on Monday and Tuesday. He'll likely need a couple rehab starts, but should rejoin the Orioles' rotation by September.

Jason Hammel (knee) will throw off a half-mound over the next couple days. Hammel has long-tossed without any issues and is ready to take the next step. Coming back from arthroscopic surgery to remove a piece of loose cartilage from his right knee, Hammel is unlikely to be ready to return until September.