Most college football teams hope for a two-deep defensive line that allows coaches to rotate heavily.
Boise State enters the 2015 season with a three-deep line -- a full 12 players ready to contribute if needed Friday night against Washington.
"There's obviously a drop-off, but there's 12 guys we can get some reps out of," defensive line coach Steve Caldwell said. "How good the quality will be, we'll see on Friday night."
The Broncos listed three guys at each line position on the depth chart: senior Tyler Horn, junior Sam McCaskill and senior Rondell McNair at end; seniors Armand Nance, Justin Taimatuia and Robert Ash at nose tackle; seniors Tutulupeatau Mataele and Antoine Turner and junior Elliot Hoyte at tackle; and juniors Kamalei Correa and Gabe Perez and redshirt freshman Jabril Frazier at stud end.
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All but Mataele and Frazier, who will make their Boise State debuts, have spent time in the Broncos' rotation in the past.
How many of the 12 get on the field will depend on the flow of the game, Caldwell said.
"I tell them every day you've got to prepare like you're going to play," he said. "If you don't play, that's just part of it. But if you're called on, you've got to be ready to go."
The most intriguing lineman is Frazier, the only freshman or sophomore among the top 12. He announced he would go to Boise State on National Signing Day in 2014, saying his other top option was a grayshirt offer from USC. He also held offers from Indiana, Illinois, Arizona, Utah and San Diego State, he said.
Frazier, a three-/four-star recruit, was academically ineligible to practice last fall but was in school at Boise State. Coaches raved about his approach to that situation. He recorded 191 tackles in his final two years of high school.
"He's had a good camp and Jabril will play Friday night," Caldwell said.
He said there isn't much he can do to prepare Frazier for what he'll experience in the stadium.
"Just go play," Caldwell said. "He's already worried about it. Just don't worry about it. You're good enough to play or I wouldn't put you out there. ... He's got to have the confidence. I have confidence in him."
The line depth kept everyone pushing each other in practice, McCaskill said.
"We're just all still competing, still playing every day like the guy behind us can take our job," he said.
McCaskill, who started the last 13 games at tackle last season, is a backup end this season. He was recruited as an end and moved inside last year because of depth issues.
"He's a great technique player," Caldwell said. "If I had all of them play the same technique he does with their ability, then we'd be where coach Caldwell's hair wouldn't be near as gray. They make it fun when they play like Sam does."
Said McCaskill: "I definitely started to get a lot more comfortable at end (recently). It was a slow transition at the start. I feel like I picked it up."
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Here are the interview videos from Tuesday, the last day of player interviews this week.