Kansas City Chiefs running back Isiah Pacheco beamed as he filmed himself on a treadmill on Monday, able to walk normally a month after breaking his fibula during a game.

Pacheco suffered the long-term injury on September 15 and is expected to be out of action for up to eight weeks.

The running back missed four Chiefs games during his time out due to injury, and no timetable has been released for when the team expects him to return.

Without him, the Chiefs never lost a game. However, Kansas City head coach Andy Reid is eager to get Pacheco back as his team is undoubtedly in a better position with him in the starting lineup.

Pacheco's smile can be seen in the middle of a gym that looks like the Chiefs' practice facility while the Red Hot Chili Peppers' “Can't Stop” plays in the background. How fitting.

Kansas City Chiefs running back Isiah Pacheco was spotted running on a treadmill on Monday

Pacheco suffered a broken fibula last month and is expected to be out of action indefinitely

Pacheco had 135 yards and a touchdown before getting injured against the Cincinnati Bengals.

Last season, Pacheco had a strong performance late in the season, finishing the year with 935 yards and seven rushing touchdowns.

In his absence, Kareem Hunt and Samaje Perine have taken over the Chiefs' backfield duties.

The Chiefs' next game is Sunday on the road against the Las Vegas Raiders, who are 2-5. The Raiders were the last team to beat Kansas City last December.

Kansas City has a longer week ahead of it through November, with a Monday night contest against the Buccaneers in Week 9.

In one of these games, Pacheco could return to the Chiefs' active roster.