White Sox Call Up Smith and McDougal as Bullpen Stress Tests Deadline Push

The White Sox are promoting left-hander Hagen Smith and right-hander Tanner McDougal from Triple-A Charlotte, per MLB.com, as the team scrambles to shore up a pitching staff ravaged by a 13-inning marathon Thursday against Boston and a forced early exit by rookie Noah Schultz on Friday. Smith, Chicago's No. 2 prospect and MLB Pipeline's 51st overall, became available after the club acquired Luis Castillo from Seattle last week—a move that signaled confidence in the rotation but also desperation in the bullpen. Both prospects now join a major-league roster mid-stretch run, which typically means high-leverage innings and limited development runway.

Smith carries a 4.32 ERA across 20 games (14 starts) at Charlotte, a stat line that would concern most evaluators until you examine the underlying mechanics: 87 strikeouts in 58 1/3 innings against 40 walks. The strikeout rate projects favorably—he's generating whiffs at a pace that suggests his move to the majors isn't a panic call. McDougal presents a cleaner Triple-A resume: 2.86 ERA in 15 games with 40 strikeouts in 34 2/3 innings, though his usage (six starts in 15 appearances) suggests relief work awaits. The club's fifth-round pick from 2021, McDougal is further along in minor-league seasoning and may see quicker pathway to late-inning usage if the rotation continues to strain.

The timing of these callups reveals structural stress. Chicago didn't promote two of its top four prospects for routine depth; it did so because Thursday's extended game drained the bullpen and Friday's opener forced an early hook. This isn't a mid-August breathing room situation—it's a signal that the rotation, despite the Castillo acquisition, is thin. For bettors, the implication is that White Sox pitching lines will carry elevated volatility over the next week. Starters may be on shorter leashes, bullpen usage patterns may fragment, and the team total over/under becomes a weather-dependent proposition rather than a stable number.

Smith's 87 strikeouts in 58 1/3 innings translates to roughly 13.4 K/9—a rate that, if sustained in the majors, would slot him as an above-average strikeout arm. However, the 40 walks (6.18 BB/9) are the limiting factor; his control profile suggests he'll be effective in shallow appearances (relieving or short-stint starts) rather than workmanlike volume roles. Markets will likely overcorrect to his prospect pedigree rather than his actual command metrics. Any strikeout prop priced for a baseline major-league starter should be faded; any strikeout under for Smith's first or second appearance should be considered, as he'll likely work in restricted innings with elevated walk risk.

McDougal's tighter ERA and lower walk rate (40 Ks, likely fewer than 20 walks at Charlotte) make him a more immediate reliable arm. If he slots into back-of-bullpen or middle-relief work, his strikeout rate in those short windows will be cleaner than Smith's. The broader edge for White Sox bettors: team totals should track toward unders over the next 3-5 games as both pitchers integrate and the bullpen reorganizes around their deployment. The rotation isn't stable yet, and that instability primes the under on games where either Smith or McDougal appears in a reserve capacity.