Robert Mathis boasts an enviable resume. The pass-rusher spent his entire 14-year career with the Indianapolis Colts, was named to six Pro Bowls, led the league in sacks in 2013, and won a Super Bowl in 2006.

But it’s that last accomplishment that still eats at Mathis, who believes the Peyton Manning-era Colts should have more than one ring to their name.

“Looking back on that team, I feel a mix of pride, and, I’ll admit, the slightest bit of disappointment,” Mathis wrote in the Players’ Tribune on Friday. “I’m so proud of what we accomplished during our era of Colts football, but I think every person, down to the last man, would tell you that he expected to win more than one ring in Indy. If there’s any regret I have from my career, it’s that.

The Colts made another Super Bowl in 2009, losing to the New Orleans Saints in heartbreaking fashion.

Mathis’ career extended into the Andrew Luck era, and while the Colts appeared on track to contend for another Super Bowl before the sack master’s time in the NFL was over, Indy quickly fell apart, missing the playoffs in 2015 and 2016 before Mathis hung up his cleats this offseason.

While Mathis is disappointed to have only one ring on his hand, he still has the Colts’ win over the Chicago Bears in Super Bowl XLI to reminisce about in his retirement.

“Not to sound arrogant, but after we beat the Patriots in that game, the Super Bowl almost seemed like a formality.” Mathis wrote. “The Bears were a great team, but that was our game. They said we couldn’t play in the elements, and all we did was hold the Bears offense to a single touchdown in a huge rainstorm to win that game.

“After far too long, we finally got Peyton his ring.”

Copyright © 2017 Score Media Ventures Inc. All rights reserved. Certain content reproduced under license.