Foster signed a minor-league contract with the Diamondbacks on Saturday.

EDGE Analysis

Foster has not appeared in any affiliated games in 2025 and last pitched for the White Sox in 2024. He spent most of his season with Triple-A Charlotte and will likely spend the majority of his time at the same level for Arizona.

Foster (back) elected free agency Monday.

EDGE Analysis

The White Sox removed Foster from their 40-man roster and he has chosen free agency rather than accepting an outright assignment. Foster finished the 2024 season on the injured list with a back injury and it's not clear what his current health situation is.

Foster was placed on the 15-day injured list Friday with a lower-back disc herniation.

EDGE Analysis

The move is retroactive to Sept. 12. Foster gave up two runs in 3.2 innings over four appearances since getting recalled from Triple-A Charlotte on Sept. 3. Jake Eder was promoted in a corresponding move.

The White Sox recalled Foster from Triple-A Charlotte on Tuesday, LaMond Pope of the Chicago Tribune reports.

EDGE Analysis

Foster made two scoreless appearances last month during his first stint in the big leagues since he had Tommy John surgery in August 2023. The right-hander will offer interim manager Grady Sizemore a fresh relief arm after he used his bullpen to cover 4.2 innings in Monday's loss to the Orioles.

The White Sox returned Foster to Triple-A Charlotte after Wednesday's doubleheader versus Texas.

EDGE Analysis

Foster threw two scoreless innings while serving as Chicago's opener in the nightcap, giving up two hits and a walk while recording a strikeout. He'll now return to the minors and continue to serve as organizational bullpen depth, though given his effectiveness in both the majors and Triple-A, there's a good chance he makes another appearance for the White Sox before the end of the year.

Foster was added to the White Sox's roster as the 27th man ahead of the second game of Wednesday's doubleheader against Texas.

EDGE Analysis

Foster will also serve as the opening pitcher for the White Sox, as they plan on relying on their bullpen to get them through Wednesday's nightcap. The 29-year-old righty threw a scoreless inning out of the bullpen during his season debut Aug. 16, and he owns a 2.40 ERA through 15 innings at Triple-A Charlotte.

Foster was optioned to Triple-A Charlotte on Monday.

EDGE Analysis

Foster was reinstated from the 60-day injured list Friday after making a full recovery from Tommy John surgery, and he'll be sent to work in the minors after making one appearance with the big club. He tossed a scoreless frame Friday against Houston, collecting one strikeout and a hold in the process.

The White Sox reinstated Foster (elbow) from the 60-day injured list Friday.

EDGE Analysis

Foster's lengthy recovery from Tommy John surgery he underwent in April 2023 is finally complete, as he joins the White Sox active roster Friday. The 27-year-old made 14 minor-league rehab appearances, 11 of which were for Triple-A Charlotte, where he logged a 2.31 ERA and 17 Ks across 11.2 innings. Dominic Leone (elbow) was placed on the 60-day injured list in a corresponding move.

Foster (elbow/back) is expected to resume his rehab assignment with Triple-A Charlotte in the coming days, Daryl Van Schouwen of the Chicago Sun-Times reports.

EDGE Analysis

Foster has missed the entirety of the 2024 season so far while continuing to recover the Tommy John surgery he underwent in April of 2023 and most recently he suffered a strained back earlier in July while on his rehab assignment with Charlotte. Manager Pedro Grifol said Monday that the right-hander will appear in another game in the next day or two. Once healthy, Foster will likely be used in low-leverage spots out of Chicago's bullpen until he finds his footing again at the major-league level.

Foster's (elbow) returned to Chicago on Wednesday after his rehab assignment at Triple-A Charlotte was paused due to a strained back, Vinnie Duber of AllCHGO.com reports.

EDGE Analysis

Foster will be further examined in Chicago, but he doesn't appear to be dealing with a major setback, as the White Sox haven't ruled out sending him back out on his rehab assignment as soon as this weekend. The right-hander hasn't pitched in the majors since September 2022 after undergoing Tommy John surgery but could be a factor in the White Sox's bullpen in the second half.