FWIW, MLB.com has Rock as the 56th best draft eligible player, which would put him the second round.
https://www.mlb.com/prospects/draft /
Here is the scouting report that accompanies his ranking on MLB.com:
Rock cracked Ohio's rotation as a freshman in 2019 and made a Cape Cod League cameo at the end of that summer, then disappeared last spring because he was academically ineligible. He got back on the mound in the All American Collegiate League during the summer and had scouts flocking to see him during the fall. More than two dozen attended an outing in which he struck out six in two innings, and he has enough helium to possibly surpass former big leaguer Dave Tobik (third round, 1974) as the highest-drafted pitcher in Bobcats history.
After sitting around 90 mph with his fastball as a freshman, Rock dealt at 93-96 with riding life on his four-seamer in abbreviated starts in the fall. He still has room to add plenty of weight to his 6-foot-6 frame, so he should continue to gain velocity. He also has picked up power with his breaking ball, which combines slider velocity (82-85 mph) with curveball depth.
Rock can miss bats with two pitches and also shows feel for a third with an effective changeup. He has a lower arm slot and some funk in his delivery, which led to 37 walks in 59 innings in 2019. But he's doing a better job of throwing strikes now, enough that scouts believe he'll remain a starter, and his mechanics provide deception.