2:59 PM - Ken Waldichuk (OAK) underwent Tommy John surgery on his left elbow Wednesday, Martin Gallegos of MLB.com reports.

6:51 PM - Ken Waldichuk (OAK) will undergo left elbow surgery Wednesday, Martin Gallegos of MLB.com reports.

2:54 PM - Ken Waldichuk (OAK) (elbow) will visit with Dr. Neal ElAttrache on Monday, Martin Gallegos of MLB.com reports.

1:42 PM - Ken Waldichuk (OAK) (elbow) experienced a setback after throwing a 25-pitch live batting practice April 29 and is shut down for the time being, MLB.com reports.

7:27 PM - Ken Waldichuk (OAK) (elbow) threw 25 pitches against live hitters Monday, Martin Gallegos of MLB.com reports.

2:58 PM - Ken Waldichuk (OAK) (elbow) threw a successful 30-pitch bullpen session Tuesday, MLB.com reports. " looked really good and got his velocity up from his last bullpen," said A's manager Mark Kotsay. "He's trending in the right direction."

12:02 PM - Ken Waldichuk (OAK) (elbow) could begin a rehab assignment sometime next week, Martin Gallegos of MLB.com reports.

2:58 PM - Ken Waldichuk (OAK) (elbow) threw a 20-25 pitch bullpen Friday, the Associated Press reports.

5:04 PM - Ken Waldichuk (OAK) (elbow) threw a bullpen session Monday that went off without any setbacks, Jason Burke of SI.com reports.

7:41 PM - Ken Waldichuk (OAK) (elbow) will throw a bullpen session Wednesday, Martin Gallegos of MLB.comreports.

2:13 PM - Ken Waldichuk (OAK) Athletics placed Waldichuk (elbow) on the 60-day injured list Wednesday.

11:55 AM - Ken Waldichuk (OAK) (elbow) was cleared to play catch Wednesday and could be throwing bullpen sessions by the end of spring training, Martin Gallegos of MLB.com reports.

6:48 PM - Ken Waldichuk (OAK) general manager David Forst said Friday that Waldichuk (elbow) likely won't be ready for the start of the season, Martin Gallegos of MLB.com reports.

12:16 PM - Ken Waldichuk (OAK) underwent a Tenex procedure on Oct. 17 and received a PRP injection on Oct. 24 after being diagnosed with a left UCL sprain and flexor strain.

5:50 PM - Ken Waldichuk (OAK) is listed as the Athletics' starting pitcher for Friday's game against the Tigers in Oakland, Evan Woodbery of MLive.com reports.

10:13 AM - Ken Waldichuk (OAK) dropped to 3-8 on the season while working in bulk relief in Sunday's 10-1 loss to the Padres, striking out two while allowing six runs on nine hits.

10:17 AM - Ken Waldichuk (OAK) who was originally slated for a conventional start Sunday against the Padres, will now serve as the primary pitcher behind opener Joe Boyle, who is expected to be called up from Triple-A Las Vegas, MLB.com reports.

1:57 PM - Ken Waldichuk (OAK) will start for the Athletics on Tuesday against the Blue Jays, Martin Gallegos of MLB.com reports.

10:30 AM - Ken Waldichuk (OAK) didn't factor into the decision against the Red Sox on Wednesday, allowing four earned runs on five hits and three walks over 4.1 innings. He struck out five.

6:11 AM - Ken Waldichuk (OAK) did not factor into the decision Friday, allowing three runs on three hits and two walks over 3.2 innings against the Twins. He struck out five.

9:58 AM - Ken Waldichuk (OAK) (2-6) took the loss against the Red Sox on Sunday, allowing an earned run on two hits over 1.1 innings. He struck out one.

11:03 AM - Ken Waldichuk (OAK) (2-5) earned the win in Wednesday's 12-3 victory over the Tigers after allowing two runs on two hits and three walks while striking out three over 4.1 innings out of the bullpen.

3:05 PM - Ken Waldichuk (OAK) will serve as a bulk reliever behind opener Austin Pruitt in Wednesday's game in Detroit, Martin Gallegos of MLB.com reports.

5:08 PM - Ken Waldichuk (OAK) is expected to pitch the bulk of the innings for the Athletics on Wednesday in Detroit, Martin Gallegos of MLB.com reports.

9:46 AM - Ken Waldichuk (OAK) served as the opener for Tuesday's game against the Guardians, firing 1.2 scoreless innings during which he allowed two hits and recorded two strikeouts.

6:30 AM - Ken Waldichuk (OAK) picked up the save Monday against the Rays, allowing two hits recording five strikeouts over three scoreless innings. He did not walk a batter.

2:18 PM - Ken Waldichuk (OAK) pitched the seventh inning of Wednesday's 4-2 loss to Atlanta, giving up one earned run on two hits and one walk while striking out one.

12:43 PM - Ken Waldichuk (OAK) served as the opener in Sunday's loss to the Astros, allowing an earned run on one hit over an inning while recording two strikeouts.

12:52 PM - Ken Waldichuk (OAK) is scheduled to serve as the Athletics' opener in front of primary pitcher Luis Medina in Sunday's game against the Astros, Martin Gallegos of MLB.com reports.

5:44 PM - Ken Waldichuk (OAK) (calf) is no longer starting for the A's on Wednesday versus the Mariners, Ryan Divish of The Seattle Times reports.

10:52 AM - Ken Waldichuk (OAK) manager Mark Kotsay said Waldichuk (calf) played catch Sunday for the second straight day, but the team has yet to decide whether the lefty will be fit to make his next start Wednesday in Seattle, MLB.com reports.

1:19 PM - Ken Waldichuk (OAK) who exited Friday's loss to the Astros with a mild calf strain, was feeling better Saturday and could make his next scheduled start Wednesday, the Associated Press reports.

8:13 AM - Ken Waldichuk (OAK) did not factor into the decision Friday, allowing four runs (three earned) on seven hits and five walks over five innings against Texas. He struck out five.

11:25 AM - Ken Waldichuk (OAK) manager Mark Kotsay announced Wednesday that Waldichuk will now start Friday's game against the Rangers, Martin Gallegos of MLB.com reports.

7:53 AM - Ken Waldichuk (OAK) did not factor into the decision Tuesday, allowing zero runs on five hits and three walks over five innings against the Cubs. He struck out five.

10:52 AM - Ken Waldichuk (OAK) did not factor in the decision Wednesday against the Orioles, allowing three runs on five hits and three walks over 6.1 innings. He struck out four.

6:39 PM - Ken Waldichuk (OAK) will open the year in the Oakland rotation, Matt Kawahara of the San Francisco Chronicle reports.

8:09 PM - Ken Waldichuk (OAK) has allowed nine earned runs on nine hits and seven walks while recording four strikeouts across six innings over three Cactus League appearances (two starts).