After his injury, Seabold put up good numbers, but his stuff was inconsistent and his velocity did not return. He sat 89-92 mph and topped out at 93, a grade below what he was before. His feel for his changeup was still inconsistent, to the point where scouts saw his slider as having replaced it as his primary secondary. Scouts still have confidence in his feel and command, but the decreased velocity and regressing changeup create a wider range of outcomes. Seabold still has major league potential, but he looks more like a number five starter or swing-man type rather than the potential number four starter he looked like before. In the AFL, I will be closely watching reports on his stuff to see if his velocity and changeup come back. If they do, his projection could return to what it was heading into the season, but if not, it adds another data point and further questions about whether his pre-injury stuff will ever come back and lead to more questions heading into 2022.
His stuff did not come back during the AFL.
His best pitch was his changeup, but now it's his third best pitch at best.
All the talk about "wider range of outcomes" means bullpen arm and spot starter ceiling unless his stuff comes back IMO.
From Fangraphs:
He’s shown the ability to pair his four-seamer with his plus changeup, which he throws with significantly less velocity (in the low-80s) and late fade, often wreaking havoc on hitters’ timing. But when the velocities of those pitches dip, as was the case in 2021 (perhaps a result of the elbow issue that sidelined him earlier in the season), advanced hitters have been able to square them up. As a result, the aforementioned havoc was not wreaked when Seabold was called upon to make his big league debut after Chris Sale tested positive for COVID. Seabold lasted three innings and allowed three hits, including a Leury García two-run no-doubter on an 80 mph changeup he left over the heart of the plate. He also walked two and failed to issue a strikeout – a far cry from the 25.3% strikeout rate and 1.06 WHIP he’d posted at Triple-A. He was sent back down once the COVID cloud lifted and made three more starts in 2021, including one that saw him leave the game after just 2.1 innings and another during which he didn’t strike anyone out.