Michigan State’s defense could end up being defined by one simple thing this fall: whether Ben Roberts can stay on the field.
That’s the central thread running through Roberts’ spot at No. 11 on the Spartans’ top-30 countdown for the 2026 season. Michigan State needs him, and not just because he’s one of the more proven bodies up front. “Big Worm” also carries real weight in the locker room, which only raises the stakes around his third season with the program.
Roberts arrived in East Lansing after two years at Oregon, where the former 4-star recruit from Salt Lake City, Utah, never really got much runway. He played in only nine games across the 2022 and 2023 seasons for the Ducks and logged 82 defensive snaps. When he entered the portal after that, the buzz wasn’t exactly loud - 247Sports had him 1,409th overall in its 2024 portal rankings and 150th among defensive linemen.
His first season at Michigan State in 2024 was the first time he saw the field with any regularity. As a redshirt sophomore, he played 128 defensive snaps across 10 appearances, though injury cost him two games.
Last season, his role grew again. Roberts appeared in seven games for MSU in 2025 and made six starts, and his 69.9 overall defensive grade from Pro Football Focus was the best on the team among interior defensive linemen.
The issue, though, has followed him throughout his time in East Lansing: availability. Roberts has missed time because of injury in both of his seasons with the Spartans, and that’s a problem Michigan State simply can’t keep absorbing. The depth chart inside is thin enough already.
That’s what makes the interior defensive line such a pressure point for this team. Most programs need at least three interior linemen ready to roll every week, and Michigan State is sitting on roughly three it can feel good about.
Roberts is likely the best of the bunch. Illinois transfer Eli Coenen and former 4-star recruit Derrick Simmons give the Spartans a pair of options behind him, but the drop-off after that gets steep in a hurry.
Carlos Hazelwood, a transfer from Toledo, is next in line, but he played only 83 defensive snaps for the Rockets last season. Mikeshun Beeler saw just six defensive snaps a year ago. Then there’s true freshman Hudson Aultman, who flipped to Michigan State as a recruit from Miami (OH).
The contrast with Roberts is pretty clear. He’s the only one in that top group with a real injury history.
Coenen played in all 13 of Illinois’ games last season and appeared in 13 of 14 possible games the year before at Division II Bemidji State. Simmons is still early in his career, with 44 defensive snaps as a true freshman last fall, but his blue-chip status means Michigan State will expect him to contribute heavily.
If that top three stays healthy, Michigan State’s defense has a chance to look a whole lot sturdier. If it doesn’t, the problems can spread fast.
A thinner defensive line opens the door to more success on the ground, and once that happens, the passing game gets easier too. That’s how the whole thing starts to snowball.
Roberts’ decision to remain at Michigan State also matters here. He could have likely moved on as a grad transfer for his final season, but he stayed through the coaching change. One reason was Pat Fitzgerald keeping defensive coordinator Joe Rossi on the staff.
“Coach Rossi has done a great job with me,” Roberts said during the spring. “He's kept it 100 [percent] with me.
He's one of the best defensive coordinators in the country. I mean, who wouldn’t want to play for Coach Rossi?
He brings the fire every day, and that’s why we want to play [for him].”
Fitzgerald has made an impression too. Spring reports pointed to practices carrying more energy, and Roberts noticed it as well.
“I think it’s definitely a blessing to have Coach Fitz,” Roberts said. “He’s done a great job trying to establish a culture and in trying to bring this place back and put it back on top where it belongs, because, obviously, Coach [Mark] Dantonio and all of them have done it. Everybody on the team, we have faith and belief in Coach Fitz and what he can do as a defense.”
For Fitzgerald in Year 1, the bar is simple: get to six wins and earn a 13th game. Michigan State has dropped four straight seasons, so even modest progress would count.
Roberts should be right in the middle of that push. If he stays healthy, he has a real chance to be Michigan State’s best defensive tackle and a major piece of what the Spartans want to build in 2026.
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