RHP Henderson Alvarez (right shoulder surgery, July 2015) has been cleared by doctors to begin preparing to resume his throwing program. Alvarez has been shut down twice after suffering setbacks during rehab stints this season. "Doctors have cleared him from all issues we were worried about," A's manager Bob Melvin said. "Hopefully, he'll start a throwing program soon."

RHP Henderson Alvarez was transferred to the 60-day disabled list Saturday. Alvarez, who signed as a free agent in December, underwent surgery on his right shoulder last July and has yet to pitch for the A's. The club interrupted Alvarez's rehabilitation program after he met with Dr. James Andrews on Wednesday and Thursday.

RHP Henderson Alvarez was moved to the 60-day disabled list.

RHP Henderson Alvarez (right shoulder surgery) has been shut down for the second time this season during his comeback attempt after experiencing pain in his throwing shoulder Saturday during a rehab start for Triple-A Nashville. He will be examined again by orthopedic surgeon Dr. James Andrews. Last year, when he played for the Miami Marlins, Alvarez had season-ending shoulder surgery on July 28. "He pitched three innings and had to come out," A's manager Bob Melvin said. "Went out for the fourth to warm up and was feeling some pain in his shoulder again. Shut him down, unfortunately. Right when we get on the verge of having him back here, something pops up. That's why you go through this rehab process, to try to incrementally get him ready to pitch here. Again, it's a setback. He was looking so forward to coming back and helping his team. It's pretty demoralizing. I know he's having a tough time with it right now."

RHP Henderson Alvarez (right shoulder surgery) has been shut down for the second time this season during his comeback attempt after experiencing pain in his throwing shoulder Saturday during a rehab start for Triple-A Nashville. He will be examined again by orthopedic surgeon Dr. James Andrews. Last year Alvarez had season-ending shoulder surgery on July 28.

RHP Henderson Alvarez (shoulder surgery) was considered as a possible starter for Saturday but manager Bob Melvin noted the club has chosen to be conservative and will keep him in his scheduled injury-rehab start at Triple-A Nashville.

RHP Henderson Alvarez threw a 45-pitch bullpen session on Wednesday, and plans to start for Triple-A Nashville on Saturday when he hopes to pitch 5-6 innings as his rehabilitation from shoulder surgery 11 months ago continues. A's manager Bob Melvin left the door open to the possibility Alvarez's next action could be for Oakland if all goes well with Nashville.

RHP Henderson Alvarez (right shoulder soreness) made a 55-pitch rehab start Monday night for Class A Stockton. He allowed three runs and six hits over 3 1/3 innings with two strikeouts and one walk. Alvarez underwent season-ending surgery on his shoulder on July 28 and began this season on the disabled list. He had a setback in his recovery last month, but the A's hope he is back on track for a return to the big leagues this season. Alvarez went 12-7 with a 2.65 ERA in 2014 for Miami and made the National League All-Star team.

RHP Henderson Alvarez is expected to work two-to-three innings Monday in a minor-league rehab start for Class A Stockton. Alvarez has not pitched this season after undergoing surgery on his right shoulder performed last July.

RHP Henderson Alvarez had an MRI exam on his sore right shoulder Tuesday. Alvarez had right shoulder surgery on July 28, ending his 2015 season. He has been on a rehab assignment with Triple-A Nashville before experiencing a setback during his latest start. "They think it's just a little bit of a strain in the shoulder, but we'll know more after our doctors take a look at the MRI later on in the evening," Melvin said before the Athletics' game against Texas on Tuesday.

RHP Henderson Alvarez had "his first little setback" in his recovery from July 28 shoulder surgery, manager Bob Melvin said. Alvarez experienced some soreness in his shoulder during his latest rehab start for Triple-A Nashville. "His shoulder bothered him a little bit," Melvin said. "He's here today. He'll visit with the doctors and we'll know more. An MRI is a possibility."If all had gone well in his last Triple-A start, Alvarez was expected to join the rotation this week. Now he might have to make another minor league start.

RHP Henderson Alvarez (shoulder) is on the verge of returning to the Oakland rotation from last July's major surgery. "We aren't going to rush him, as much as we would like to have him back here," Oakland manager Bob Melvin said of Alvarez. "There will be at least two more rehab starts."

RHP Henderson Alvarez (right shoulder surgery) is progressing well in his rehab starts. Alvarez threw 4 2/3 innings Thursday for Triple-A Nashville, allowing a run on three hits with three strikeouts and three walks. Melvin said he could rejoin the team after two more outings, throwing 75 and then around 90 pitches, respectively. "If things go right, that will be his last two," Melvin said. Alvarez was signed as a free agent in the offseason.

RHP Henderson Alvarez (right shoulder surgery in July 2015) made his fourth minor league rehab start Thursday, this time for Triple-A Nashville. He allowed one run in 4 2/3 innings. In four rehab outing, two for Nashville and two for Class A Stockton, Alvarez has a 1.98 ERA.

RHP Henderson Alvarez (right shoulder surgery in July 2015) will make his fourth minor league rehab start Thursday with Class A Stockton. He gave up a run on one hit in four innings for Stockton on Saturday. Alvarez walked one and struck out four. He is expected to go five innings and throw 75 pitches the next time out. Adding a potential All-Star would strengthen any pitching staff, and he should join the A's at some point this season.

RHP Henderson Alvarez is on schedule to join the A's in mid-May. He's slated to pitch for Single-A Stockton in Modesto on Saturday. A's manager Bob Melvin said he'll throw about 60 pitches or four innings.

RHP Henderson Alvarez makes a rehab start for Class A Stockton on Sunday and is expected to throw 60 pitches or four innings.

RHP Henderson Alvarez will continue his rehab assignment with Class-A Stockton on Saturday. He's scheduled to throw four innings and approximately 60 pitches. He gave up an unearned run in a two-inning appearance with Triple-A Nashville on Moday. Alvarez had shoulder surgery last summer and the A's are hoping he can join the rotation sometime next month.

RHP Henderson Alvarez, who underwent shoulder surgery last summer, will continue his rehab assignment with Single-A Stockton on Saturday.He's scheduled to throw four innings and approximately 60 pitches.

RHP Henderson Alvarez gave up an unearned run in two innings during a rehab start with Triple-A Nashville on Monday. He is working his way back from season-ending shoulder surgery last summer. "They made a couple of errors behind him early in the game," manager Bob Melvin said. "We didn't want him to go out for a third inning based on a 45-pitch limit but he threw the ball well. His velocity was 89 to 94, which kind of surprised me. It's all good going forward to the next step."