Kage Casey is ready to prove his versatility.

The Broncos drafted the 6-foot-5, 310-pound offensive lineman with their No. 111 overall pick in the fourth round. Casey started 41 career games at left tackle for Boise State. Now, he’s been asked to move inside at the next level.

That’s why Casey approached Tim Keane, the Boise State offensive line coach and run game coordinator, with a request before his NFL Pro Day.

“He’s like: ‘Hey, coach, can you teach me to snap?’” Keane said in a phone interview with The Denver Gazette. “In two weeks, he teaches himself to snap and does half of his Pro Day at center snapping the football. This is the biggest moment of his life. All of the work he’s put into trying to demonstrate he’s an NFL football player — and he’s doing something that he’s only been doing for two weeks.”

Casey is a quick study.

Over the weekend, the Oregon native stood in front of his new locker stall at Broncos Park during rookie minicamp. Casey played left guard during a team scrimmage portion of the media viewing period on Saturday, but told The Denver Gazette he will “play wherever they need me” on the offensive line.

“(Casey) is one of those guys who we felt could do a lot and even go inside and play center,” coach Sean Payton said. “I think we are working him in at guard and tackle.”

That’s high praise for an almost exclusive left tackle in college. Yet it’s no surprise to his former coaches back at Boise State. Keane discovered Casey as a lightly recruited three-star prospect. He played 1,351 college snaps, allowing just six sacks — and none over the 2024 season. Keane pulled back the curtain on his development.

“His thing has always been more than talent,” Keane told The Denver Gazette. “His first year, he early enrolls here and gets injured. He doesn’t blink an eye. He redshirts and then plays in a couple of games at tight end and tackle. He played in our bowl game with a torn shoulder, just because of how tough of a dude he is. That offseason, he’s eating like a pound of ground beef and rice at 5 a.m. every day before workouts.”

Keane continued: “As he gets more success, he just keeps doubling down on his preparation and his training. He starts doing yoga and Pilates. He would go all of June and May without eating any sugar. He’s just really into trying to be the best version of himself as possible. It kind of inspires me. I should be working a little bit harder.”

Casey explained his mentality in rookie minicamp.

“My mentality is just to compete. Learn the playbook. Make my flashcard decks. But really just getting after it every day. No fear,” Casey told The Denver Gazette. “It’s such an honor being with these guys every day. Just blessed.”

The Broncos drafted Casey with a talented but aging offensive line. Starting tackles Mike McGlinchey and Garett Bolles are in their 30s. Starting left guard Ben Powers enters a contract year in 2026. Casey is part of a youth movement to provide current depth and future starters up front.

“I’ve talked to Garett, Quinn (Meinerz) and Mike. Asking them the best ways to learn the playbook and whatnot,” Casey said on Saturday. “Playing tackle, I’ve watched Garett a lot, and bumping to guard, I’ve been watching a ton of tape on Quinn and Ben (Powers). It’s been really helpful.”

Keane has a message for Broncos Country about his former player.

“He was a guy who just put his head down and worked, because he loves being an offensive lineman,” Keane said. “It’s extremely important to him and I think he’ll do a phenomenal job in an organization like the Broncos.”