Sean Doolittle RP OAK 3 Days

Doolittle (shoulder) said he will begin playing catch Friday, Susan Slusser of the San Francisco Chronicle reports.

This is a big step in Doolittle's progression, as he has thus far been limited to sock throws since getting a platelet-rich injection in January. He hopes to join the A's by late April, but it won't be surprising if he isn't ready until May. Tyler Clippard still figures to work as the closer until Doolittle is ready.

Sean Doolittle RP OAK 4 Days

Doolittle (shoulder) went through another "two innings" of sock throws Wednesday, manager Bob Melvin believes he might begin playing catch by the end of the week, Susan Slusser of the San Francisco Chronicle reports.

Doolittle continues to rehab his shoulder following a slight tear in his left rotator cuff. While he'll likely begin the season on the disabled list, but appears to be progressing well and could be on track to rejoin the team in late April.

Sean Doolittle RP OAK 6 Days

Doolittle (shoulder) performed sock throws on Monday, taking another step in the rehab process,

reports Joe Stiglich of CSN California.

Doolittle has not thrown actual baseballs yet, but is progressing well on his shoulder rehab. There will be more concrete information available once he gets to throwing on the mound, but it still appears that he is scheduled to be back with the team in late April.

Sean Doolittle RP OAK 12 Days

Doolittle said Tuesday that he's getting closer to throwing, CSN California's Joe Stiglich reports.

Doolittle is doing plyometric work as he continues to focus on strengthening his shoulder. He won't be ready by Opening Day but could perhaps make his debut at some point in April.

Sean Doolittle RP OAK 15 Days

Doolittle is expected to start sock throws soon, Susan Slusser of the San Francisco Chronicle reports.

Doolittle seems to be steadily progressing but remains without a definite timetable for return. Further news should be released by Oakland in due time as the 28-year-old navigates the path to recovery from a slightly torn rotator cuff.

Sean Doolittle RP OAK 23 Days

Doolittle (shoulder) is still without a timetable to resume throwing, CSN Bay Area reports.

A's manager Bob Melvin said Doolittle is progressing well but the lefty remains limited to strengthening exercises. Susan Slusser of the San Francisco Chronicle suggested last month that the "general consensus" seemed to be that Doolittle might not miss much regular-season time, but an estimated return date will remain up in the air until he is cleared to pick up a baseball. Tyler Clippard is expected to serve as the A's closer in Doolittle's absence.

Sean Doolittle RP OAK 1 Month

Doolittle (shoulder) said on Thursday that his shoulder is "a lot better" and an ultrasound last week came back looking great, reports Jane Lee of MLB.com.Doolittle still has not picked up a ball since platelet-rich injections in his shoulder in January, but appears to be on right track. He is still expected to miss the start of the season, but it currently looks like the injury will not keep him out long term.

Sean Doolittle RP OAK 2 Months

Doolittle (shoulder) indicated on Sunday that his shoulder feels better and is starting a strengthening program, but there is no timetable on when he will throw off a mound, reports Jane Lee of MLB.com.

The A's are already said that Doolittle will miss the beginning of the 2015 season, but it appears he is progressing and he should reclaim the closer role as soon as he is ready. Manager Bob Melvin said on Sunday that the depth of the A's bullpen will allow the team to not have to rush Doolittle back.

Sean Doolittle RP OAK 2 Months

Doolittle has a slight rotator cuff tear in his left shoulder as well as "considerable" inflammation in the area and is not expected to be ready by the start of the season, Jane Lee of MLB.com reports.

Upon diagnosis, Doolittle was treated with a platelet-rich plasma injection, and the team will now wait until the inflammation dies down before re-evaluating him and determining the next step. With Doolittle not expected to be ready for Opening Day, the A's figure to turn to recent trade acquisition Tyler Clippard to handle ninth-inning duties to start the year. That said, Eric O'Flaherty, who served as the team's closer for a stretch last year when Doolittle was hurt, could see some opportunities based on the matchups.

Sean Doolittle RP OAK 2 Months

Doolittle has a small rotator cuff tear and is not expected to be ready for the start of the season, reports Susan Slusser of the San Francisco Chronicle.

This is big and bad news for the A's. Doolittle was expected to start the season as the A's closer and now it is unclear when he will be ready. New acquisition Tyler Clippard will likely be the favorite to close games to start the season.