Kansas City Chiefs running back Jamaal Charles has confessed that he was frustrated by his displays in the 2014 season.

The 28-year-old battled through a series of injuries throughout the campaign to play in 15 games for Andy Reid's men, and still managed to record over 1,300 rushing yards.

However, the back has insisted that he was annoyed that his injuries held him back from greater production in the season.

"It was just frustrating," Charles told reporters. "It wasn't the line; it was just me getting hurt.

"I had never played a whole season where I had nagging injuries and I can go in and I've got to come back out because my ankle hurt.

"And that was all the frustration. It wasn't about the team. The team did a great job. We won nine games last year, so it couldn't be the team."

Charles scored 14 touchdowns for the Chiefs in the 2014 campaign.