In Chip Kelly's first season as an NFL head coach, the Eagles won 10 games and went to the playoffs for the first time since 2010.
Kelly became the first coach in team history to win a division title in his first year and the Eagles' six-game improvement was the largest ever by a first-year Eagles coach.
He laid out his plan, got his players to buy in and turned heads with his innovative approach.
But, at times, his offensive scheme was viewed by many as a novelty. Will it continue to work?
"His offense is a novelty and what we're seeing is a novelty coming into the NFL that we wouldn't have seen in years past," Hall of Fame wide receiver Michael Irvin told Comcast SportsNet's Derrick Gunn. "We're in the scheme-beating-scheme systems now as opposed to men-beating-men systems. We're going to see that. It's a novelty and I expect it to be around awhile."
Fellow Hall of Famer Marshall Faulk agrees with Irvin to a certain extent.
"There's a novelty about it," Faulk said. "But when you have good players, it doesn't matter. What he's doing is he's making defenses cover the entire field."
The Eagles, who went 4-12 under Andy Reid in 2012, led the league in rushing and finished in the top 10 in overall yards, passing and points per game in Kelly's first year at the helm.
Now that the NFL has seen what Kelly can bring to the table, what does he have to do to evolve?
"I think every coach has to evolve based on who's playing, what the talent is, what's required to win." former 49ers and Lions coach Steve Mariucci said. "He'll keep evolving. He's a smart guy, he's a flexible guy. But he's certainly exciting and I like they way they play football."