I just rewatched Paxton's 1 2/3 against the Twins.
He looked very good before he pulled up hurt. He was throwing low-effort, low-velo (92-94ish), and just painting, dotting the fastball on the corners, mostly low in the zone. Mostly four-seamers, but also three of on an 81 mph split-change-looking thing (or is it a tight curveball?) that he dropped right in at the knees to freeze Correa for a backwards-K. Another breaking pitch was less competitive, a slider (probably?) at 87 in the dirt. I only saw one of those. He faced legit major league hitters, too, and conceded four gentle flyballs for outs around the K.
Being able to dot the four-seam in spots where it can't be squared up but very well might be called a strike while throwing 2/3 of the off speed/curve thing for strikes just looked like a really compelling package. If he ever gets all the way healthy, there should be more velocity, but even if there isn't, the command looked really impressive.