Coming off the best season of his three-year career, the Indianapolis Colts are reportedly working on a contract extension for running back Marlon Mack, per Jim Ayello of the Indianapolis Star.

The 23-year-old running back recorded his first 1,000 yard-season of his career when he rushed 247 times for 1,091 yards and eight touchdowns in 14 games and 12 starts for the Colts. Mack also contributed 14 catches for 82 yards in the passing game.

Considering Mack's solid season with the Colts, talks of an extension shouldn't come as a surprise, especially considering Indianapolis is high on the 6-foot, 210-pound back.

The Colts drafted Mack in the fourth round of the 2017 NFL draft out of South Florida and his role has increased every season. Mack was unquestionably Indianapolis's workhouse back in 2019 as his 247 carries were nearly 200 more touches than Nyheim Hines' 52, which was the second-most among running backs on the team.

Still on his rookie deal, the Colts have one more season before Mack becomes an unrestricted free agent after the 2021 season.

“I want to be right here,” Mack said in December. “I love it here. Love everyone here.”

The often shortened careers of NFL running backs have inspired the Colts star to try and get an extension done as soon as possible.

“In this league, as a running back, you gotta strike fast,” Mack said. “You don’t strike fast, that’s it for you. You're too old at (27). … Running backs, man, running backs don’t always get treated well. Running back is an important position. I hope people can learn that one day. I don’t know when it fell off (for us), but I need it to go back up (laughs). Hopefully it happens one of these days.”

The Colts finished 7-9 this season.