Alister Vallejo

Physical Profile

Vallejo carries 307-310 pounds on a 6-3 frame with a compact, dense build that is already college-ready for the interior. His calling card is redirecting twitch relative to his size: he changes direction and closes on the ball with quickness that 300-pounders rarely show, and 247Sports' Gabe Brooks labels him an explosive, big-bodied interior presence. He is a shot put and discus thrower in track, which shows up as rotational power through his hips and upper body. He lacks elite length for a five-technique role, so his best fit is 1-technique through 3-technique where leverage and quickness matter more than reach.

Play Style

Vallejo is a penetrator, not a two-gap space-eater. He fires off the ball low, wins the first step, and uses quick redirects to knife into the backfield, which is why his TFL numbers climbed every year even as his sack count dipped once offenses began sliding protection to him. He shows a strong motor chasing plays laterally and gets to the ball in pursuit more often than his weight suggests. Note that Liberty Hill runs a Slot-T offense, so his tape comes from a run-heavy program that limited exposure of his pass rush in traditional settings; his 16 hurries as a junior show the disruption is real when he gets one-on-one interior matchups.

Strengths

• Initial quickness and lateral redirect for a 300-plus pounder; he consistently beats interior linemen off the snap and 247Sports notes he regularly puts blockers on their heels
• Sustained backfield production across three varsity seasons: 65 tackles/12 TFL/11 sacks as a sophomore, 51 tackles/9 TFL/7 sacks/16 hurries as a junior, and 71 tackles/18 TFL/5 sacks/2 forced fumbles as a senior
• Special-teams disruption: seven blocked kicks over three seasons (1, 4, 2), evidence of get-off timing and the ability to win with leverage through the A-gap
• Track-and-field power base (shot put, discus) translates to violent hands and hip torque at contact, which supports the Mason Graham comparison Michigan's staff has embraced

Areas to Improve

• Plays flat-footed at times per 247Sports' evaluation; needs to keep his feet moving after initial contact so blockers cannot reset on him
• Hand usage and pass-rush plan need refinement; Michigan DL coach Larry Black publicly identified learning to use his hands as the key freshman hurdle for Vallejo and fellow freshman DT Davis
• Conditioning and snap-count stamina at 307 pounds against Big Ten tempo, especially as a late enrollee who missed spring practice

College Projection

He arrived in Ann Arbor in summer 2026 and sits behind Trey Pierce, Enow Etta, Jonah Lea'ea, Deyvid Palepale and Bobby Kanka on the interior depth chart. Michigan's staff, now under first-year head coach Kyle Whittingham, has told him the defensive plan is unchanged and that they want him to play early. Expect a rotational role of 10-20 snaps in 2026 similar to Mason Graham's freshman usage, a starting-caliber 3-technique by year two or three, and a multi-year starter with All-Big Ten upside if his hand usage catches up to his athleticism.

NFL Outlook

247Sports' Gabe Brooks projects a Day 3 pick (rounds 4-7) with Mason Graham as the stylistic comparison. His quickness-plus-power profile at 6-3, 307 fits the modern NFL interior, and if he develops a reliable pass-rush counter and improves his play-strength at the point of attack, he has a realistic path to a draftable grade after his junior season. The ceiling depends on whether he adds pass-rush production against Big Ten competition rather than just run-game disruption.

Best Fit

An attacking 4-3 or four-down front that lets him play 1-tech or 3-tech and shoot gaps, which is exactly how Michigan has used its interior linemen under Lou Esposito. A two-gap 3-4 nose role would waste his best trait. He is best with a bull-rush edge presence beside him so guards cannot slide help his way.