Allen Park — Kellen Moore spent three seasons with the Detroit Lions, signed as an undrafted rookie out of Boise State. From here, he went to Dallas, following former Lions offensive coordinator Scott Linehan.

Now, at 30 years old, Moore is retired from the league and is serving as one of the NFL’s youngest assistant coaches, overseeing the Cowboys quarterbacks under Linehan.

This comes as no surprise to Lions quarterback Matthew Stafford.

“No question,” Stafford said. “Kellen was a great guy to be around. He was a really smart player when he played. He had a great feel for the game and you could see it. If and when his career was over, as far as a player, he was going to be interested. And if he wanted to, he was going to be a great coach. So, I have no doubts that he’s doing a great job for those guys.”

Cowboys coach Jason Garrett, who made the decision to add Moore to the staff, also raved about his former backup quarterback’s football IQ.

“I think everybody who’s been around him probably said, ‘Boy, he’s going to be coach someday,’ “ Garrett said. “So, we’re lucky to have him. He and Scott Linehan have a great relationship, so they work very well together. Kellen, just the way he’s always looked at the game, I think it’s probably been from a coach’s perspective. His dad being a coach and him being a quarterback, I think the transition has been smooth for him and he’s really adding a lot to our staff.”

Moore never appeared in a game for the Lions, but he got on the field for three with the Cowboys in 2015, including three starts. He completed 58.4 percent of his 104 attempts for 779 yards, four touchdowns and six interceptions.

A star at Boise State, he finished his college career with a 50-3 record as a starter. He also holds the school records for passing yards and passing touchdowns.

His first year as a coach hasn’t been without hiccups. Cowboys starter Dak Prescott has struggled, failing to pass for more than 170 yards in any of the team’s three games, while throwing as many interceptions as touchdowns.

Prescott is currently on pace to set career-lows in completion percentage and passer rating.

Twitter: @Justin_Rogers