He's now among the leaders of an Illinois team desperately trying to get back on track for the 2013 season after a 2-10 clunker last fall. Ideally, Monheim could play behind several veterans for a few years, develop physically and mentally and then claim a leadership position. But a wave of injuries, combined with Monheim's emergence as a starting linebacker, have fast-tracked him to the forefront.
Illinois LB Mason Monheim said he's trying to learn the nuances of the other defensive positions so that he can become a better leader.
The good news: Monheim is OK with taking the reins. The better news: he likes it.
"I feel more of a leadership role," Monheim recently told ESPN.com. "I'm really taking ahold of the defense. I'm trying to figure other people's positions so I can help them out, and know what they're doing to help me. I'm trying to be more vocal, just trying to bring that fire a little bit, to the group.
"It's a lot better and easier when there's a little fire underneath you."
Monheim said he's not fiery by nature but likes bringing energy to Illinois' spring workouts, whether it's critiquing a teammate or celebrating with them after big plays. Despite his young age, his teammates are responding to him well.
"They're ready for that criticism," he said. "Everybody's trying to learn, whether you've been here for a few years or not."
Much of Monheim's education came between the lines on Saturdays last fall. The 6-foot-1, 230-pound Monheim started the final 10 games for Illinois and led all Big Ten freshmen in tackles with 86.
His tackles-per-game average of 7.2 tied for 15th in the league, while no other freshman ranked in the top 50. Monheim had six tackles for loss, including 1.5 sacks, to go along with two forced fumbles, an interception a fumble recovery and a pass breakup.
"I guess I didn't expect to play so much, but I went in with an open mind," Monheim said. "I knew if I would get an opportunity, I'd make the best of it for the team. That's what happened."
Monheim, a two-time Division IV all-state selection from Orville High School in Ohio, likely would have played for Toledo if Illini coach Tim Beckman had remained the Rockets' head man. But days after taking his official visit to Toledo, Monheim learned Beckman had accepted the Illinois job.
Monheim, who had received several Mid-American Conference offers, jumped on the chance to follow Beckman to Champaign.
"When I came in [last] summer, I didn't know what to expect," Monheim said. "But it wasn't anything that I was scared or didn't believe in my abilities. I have a lot of great teammates. They made it easy on me."
Monheim's challenge this spring is to better understand his teammates' responsibilities so he can lead them this fall.