SOUTH BEND, Ind. -- Previously in his coaching career, until around his early days at Cincinnati, Brian Kelly would see multiple freshmen take the field at once on Saturdays and almost cringe.
This past Saturday, he saw seven different first-year players take the field at times for Notre Dame, and what they did reminded him how college football has changed in just a short period of time.
"I don't know that you ever want to play as many freshman that we're playing, but times are changing," Kelly said. "College football is such that these kids are coming in physically so much more mature that they can come in and physically handle the rigors of playing major college football."
Freshman George Atkinson III stood out by returning a first-quarter kickoff 89 yards for a touchdown. That came one Michigan State possession after rookie Aaron Lynch forced a fumble by sacking Kirk Cousins.
"As soon as I hit him, just like a surge of energy went through my body," Lynch said of the sack. "Just set the tone for the rest of the game."
Lynch finished the game with six quarterback hurries, one week after not even seeing the field against Denard Robinson and Michigan.
The 6-foot-6, 265-pound Lynch acknowledged how much different it was going against Big Ten offensive linemen Saturday, especially since his high school opponents were at times 100 pounds lighter.
Not being able to simply bull rush someone at this level was a rude awakening.
"He gets better with playing more with his technique and then building confidence," defensive line coach Mike Elston said. "Buying into what we're coaching hasn't been easy because it hasn't worked for him in practice, because he's not doing it right. So he's back and forth on using the proper technique and not using it. And then in a game he used it and it worked out well and he built confidence on it."
The give and take was fairly simple.
"They told me I wasn't gonna play if I didn't do it right," Lynch said.
As one of five Fighting Irish freshmen who enrolled in the spring, Lynch had a longer time to earn the trust of his coaches.
Kelly credited the strength and conditioning director, Paul Longo, for getting the freshmen physically ready to shorten the learning curve.
"You're looking at Aaron Lynch going against four- and five-year players, and you worry about their physical ability to get in there and mix it up," Kelly said. "But the last four or five years, these guys are weight training all year, nutrition is important to 'em, they're taking care of their bodies, and they're coming in. And Coach Longo said this -- I didn't -- he said this was physically the most impressive group relative to their conditioning level when they came here.
"Usually they come in a few weeks after the veterans are here. They come in and they're lost. They're so far behind. This group was not. They were physically ready to compete right away."
Even then, however, there is an adjustment period.
Lynch could only go roughly six plays at a time on Saturday, something he acknowledged was difficult, but a feat that also showed how far he had come with one offseason.
"I know before the season started I wouldn't have been able to go six straight plays," he said. "It's kind of hard to do six straight plays now, just going into my first game and actually having to put that pressure on my back. But I feel like just work hard during practice and go to the ball every time you see it, you'll be straight. You won't be really tired, because you got the energy going and adrenaline rushing and stuff like that, so you'll be straight."
Sophomore noseguard Louis Nix, who didn't play last season, had to drop more than 40 pounds before he could take the field for the first time this season.
This past spring, Kelly told him to expect 12-15 snaps per game, and Nix said that wouldn't be good enough. With fellow noseguard Sean Cwynar dealing with a broken right hand, Nix has lived up to his word, playing 30-40 snaps per game and starting twice so far, surprising even himself with his stamina.
"Last year or the year before, I probably could have did two snaps," the now-326-pounder said with a laugh.
Such contrast between the early development of Lynch and Nix helps explain why defensive coordinator Bob Diaco has a blanket philosophy on playing freshmen.
"I don't think at this point in time that there's any timetable," Diaco said. "Just, when you're ready, we're ready. When you're ready, we're ready. That's it. And when you're ready to do the jobs, whatever they are, you don't have to do be able to do all the jobs, if you can do some of the jobs. You're ready, we're ready.
"When you're ready to go in and you're better than everybody else at that spot, when you're ready to go in and whip your individual matchup, when you're ready, we're ready."