Keller (shoulder)signed a minor-league contract with the White Sox on Friday that includes an invitation to spring training.

EDGE Analysis

Keller's 2023 season ended in September when the Royals put him on the injured list with symptoms associated with thoracic outlet syndrome. It's uncertain what his current health situation is, but the White Sox clearly felt comfortable enough with it to give the righty a non-roster invite. Keller has been an effective innings-eater in the past and is still just 28, but he holds a 5.14 ERA since the start of the 2021 campaign. The White Sox will likely send him to the minors initially, but given their dearth of rotation options, he could wind up making starts for them sooner rather than later.

Keller was placed on the 15-day injured list Wednesday due to symptoms associated with thoracic outlet syndrome.

EDGE Analysis

Keller dealt with symptoms of thoracic outlet syndrome earlier this season while on the injured list with a shoulder impingement, and those symptoms apparently resurfaced since being reinstated from the injured list Sept. 9. The right-hander will finish 2023 having pitched in just 11 games, and he had a 4.76 ERA, 1.94 WHIP and 31:45 K:BB over 45.1 innings. He's scheduled to hit free agency during the offseason, but the injury will cloud his outlook for 2024.

Keller (shoulder) was reinstated off the 60-day injured list Saturday.

EDGE Analysis

Keller recorded a 4.36 ERA in nine starts before suffering a shoulder injury in mid-May, though his combination of a 15.4 percent strikeout rate and a 19.9 percent walk rate arguably deserved far worse. He's worked as a reliever while on his rehab assignment, posting a 6.10 ERA and 1.65 WHIP in 10.1 innings, and figures to step into a low-leverage relief role over the final few weeks given that he isn't stretched out to start.

Keller (shoulder) will begin a rehab assignment Monday with Kansas City's affiliate in the Arizona League.

EDGE Analysis

Keller had a chance to kick off an official rehab assignment last week, and he did not have to wait much longer to begin one. Keller's last rehab assignment was paused midway through, so expect the Royals to try their best to avoid a similar outcome.

Keller (shoulder) could begin a rehab assignment this week, Anne Rogers of MLB.com reports.

EDGE Analysis

Keller had a July rehab assignment cut short after experiencing soreness in his shoulder, but he has been throwing in the bullpen, and if all continues to go well he could join one of Kansas City's affiliates before the week comes to a close.

Keller's will receive further testing after his right shoulder discomfort returned, Anne Rogers of MLB.com reports.

EDGE Analysis

Keller returned from his rehab assignment after his 30 days were up Thursday, but he wasn't activated from the IL due to a setback in his recovery. The results of Keller's test will determine how much longer he stays on the shelf, but the fact Keller was unable to keep pitching isn't a good sign. The 28-year-old righty put up a 4.36 ERA and 1.87 WHIP through 43.1 innings before getting injured in May.

Keller (shoulder) was returned from his rehab assignment Thursday.

EDGE Analysis

Keller's 30 days on assignment were up, so the Royals will soon have to decide what to do with the right-hander. He appeared in nine games for Triple-A Omaha, covering nine innings with a 15.00 ERA, 3.56 WHIP and 5:21 K:BB while working as a reliever for a majority of the assignment. Given those numbers, it wouldn't be shocking to see him pitch out of the bullpen if he remains on the big-league roster once he's activated from the injured list.

Keller (shoulder) retired just one batter and allowed six earned runs on four hits and three walks in his latest rehab appearance Sunday with Triple-A Omaha.

EDGE Analysis

Keller has now made six appearances for Omaha, but he may not be any closer to being activated from the 15-day injured list than when he first started the assignment June 28. He's been roughed up in each of his last three outings, recording five outs in total during that span while surrendering 13 runs (11 earned) on seven hits and eight walks. Though Keller had been a member of the Kansas City rotation prior to landing on the IL on May 19 with right shoulder impingement syndrome, he may be ticketed for the bullpen once he's reinstated. He's worked in relief in four of his six rehab appearances, including each of the last three.

Keller (shoulder) worked two innings in his rehab start Wednesday with Triple-A Omaha, striking out three while allowing one run on two hits and two walks.

EDGE Analysis

The Royals have held Keller to a three-day rest schedule since he opened his rehab assignment June 28, with the right-hander having now worked exactly two innings in consecutive appearances after recording just one out in his first outing. Given Keller's usage thus far during the rehab assignment, it's not entirely clear if the Royals are building him back up for a starting role, though that still seems to be a likely outcome due to the lack of other impact rotation arms in the majors and high minors. Even if Keller is ready to return from the 15-day injured list shortly after the All-Star break and reclaims a spot in the Kansas City rotation, he won't make for a particularly enticing fantasy option after compiling a 3-4 record and pitching to a 4.36 ERA and 1.87 WHIP over 43.1 innings prior to being shelved with the shoulder issue.

Keller (shoulder) will begin a rehab assignment Wednesday with Triple-A Omaha, Anne Rogers of MLB.com reports.

EDGE Analysis

Keller might need multiple outings on the farm given that he's been sidelined since May 19 because of right shoulder impingement syndrome. The 27-year-old had pitched to a 4.36 ERA, 1.87 WHIP and 31:40 K:BB in 43.1 innings prior to the IL stint.