Sean Burnett (elbow) underwent successful Tommy John surgery this week.

It's the second time that he has undergone the procedure. He's looking at another lengthy recovery process and probably won't be an option to rejoin the Angels bullpen until the beginning of the 2016 season.

Angels transferred LHP Sean Burnett from the 15-day disabled list to the 60-day disabled list.

The move clears room on the 40-man roster for the addition of Cam Bedrosian. Burnett will soon undergo Tommy John surgery.

Sean Burnett was diagnosed with a torn ulnar collateral ligament in his left elbow.

That's usually a precursor for Tommy John surgery. If so, it would be the second time Burnett has undergone the surgery in his career. He made just three appearances with the Angels this season.

Angels placed LHP Sean Burnett on the 15-day disabled list with a left elbow injury.

Burnett just can't catch a break. The left-hander retired the only batter he faced Tuesday in his third appearance since returning from the DL, but he felt more soreness in his elbow in the process. The pitcher is headed back to Anaheim to be examined Wednesday. Burnett has been limited to 16 appearances over the last two seasons due to elbow issues.

Angels activated LHP Sean Burnett from the disabled list.

Burnett had multiple setbacks as he worked his way back from elbow surgery, but he's finally ready to make his season debut. The southpaw has been limited to 9 2/3 innings since the beginning of last season due to injury.

Angels manager Mike Scioscia said Friday that Sean Burnett (elbow) is getting "progressively better" and nearing a return to the Angels bullpen.

Burnett fanned three in a scoreless inning on his minor league rehab assignment on Thursday. If all continues to go well, he'll resume his customary setup role in the Angels bullpen before the end of the month.

Sean Burnett (elbow) will begin a rehab assignment at Double-A Arkansas on Saturday.

Burnett has had a few setbacks as he works his way back from elbow surgery but has made nice progress recently. He should rejoin the Angels' bullpen later this month if he can avoid more bumps in the road.

Sean Burnett (elbow) could be nearing a rehab assignment.

Angels manager Mike Scioscia said that Burnett "looked good" during another appearance in an extended spring training game Monday. Burnett has had a few setbacks as he works his way back from elbow surgery but appears to be moving in the right direction again.

Sean Burnett (elbow) will throw a simulated game in Arizona on Thursday.

Burnett threw a successful bullpen session recently, and he'll now face hitters as he works back from a setback with his surgically repaired left elbow. It's still unclear when he might progress to a rehab assignment, and there's no timetable for his return to the big club.

Sean Burnett's (elbow) next step is to throw a simulated game.

Burnett threw what Angels manager Mike Scioscia referred to as an "outstanding" bullpen session recently, clearing the way for him to face hitters. There's no timetable for the lefty's return after his multiple starts and stops, but it appears his arrow is pointing up for the time being.

Angels manager Mike Scioscia said Saturday that Sean Burnett (elbow) threw an "outstanding" bullpen session the other day.

While it's an encouraging sign, there remains no clear timetable for when the left-hander will be cleared to return to the Angels bullpen. With the trouble that they've had in the late innings, they could use him back as quickly as possible.

Sean Burnett (elbow) will play catch on Monday.

Burnett had been shut down for a week after having another setback with his surgically-repaired elbow. There's no timetable for the southpaw's return, as Burnett has had numerous starts and stops along the way.

Sean Burnett (elbow) has stopped his throwing program.

Burnett has had trouble getting over the hump with his offseason elbow surgery, as he's started and stopped multiple times. There's no timetable for the southpaw's return. It's a blow for an Angels' bullpen that could use a reliable left-handed relief option.

Sean Burnett threw 50 pitches -- 35 in the bullpen and 15 to hitters -- Wednesday as he works back from a left elbow injury.

"I felt like I could've gotten hitters out," Burnett said after the outing. The left-hander will remain in Arizona for the time being and is scheduled to throw another simulated game in two days. From there, he may not need much longer before being ready to face major league hitters.

Sean Burnett (elbow) will throw a simulated game on Wednesday.

He was cleared for it after throwing his third bullpen session in six days on Monday. Burnett will then go to extended spring training after the simulated game, though it's unclear how long he'll be there. He does appear to be progressing, however.

Angels placed LHP Sean Burnett (elbow) on the 15-day disabled list, retroactive to March 21, with a left elbow injury.

Burnett has experienced some bumps in the road in his comeback from elbow surgery. It's not clear at this point how long he'll be out.

Angels manager Mike Sciosicia said that Sean Burnett (elbow) was unable to "cut it loose" during his bullpen session Tuesday.

The session was a step in the right direction, but not as big of a step as the Halos had hoped for. Burnett will begin the season on the disabled list, though it's uncertain how long he might be sidelined.

Sean Burnett (elbow) is scheduled to throw a full bullpen session Tuesday.

Burnett had to stop his most recent bullpen session on Friday due to stiffness in his arm, but he's ready to give it another shot. The southpaw is expected to begin the season on the disabled list.

Sean Burnett (elbow) has been shut down for a few days with stiffness in his arm.

While this is to be expected as the veteran hurler works his way back from elbow surgery, at this point it's likely that he begins the season on the disabled list. He should be an option to rejoin the Angels bullpen in mid-April.

Sean Burnett (elbow) threw another successful bullpen session Thursday morning in Angels camp.

Burnett called the workout "the biggest step forward we've taken." He is working his way back from August elbow surgery and aiming to be 100 percent by Opening Day.