Mewhort was placed on the reserve/retired list by the Colts on Wednesday, Andrew Walker of the team's official site reports.
Mewhort announced his retirement from the NFL after four seasons. The 2014 second-rounder started 30 games in his first two seasons with Indianapolis, showing strong potential in that time. Injuries unfortunately seem to have derailed Mewhort's career, causing him to miss 17 games over the previous two years. Mewhort's retirement reduces the Colts' roster to 89 players, allowing them to sign another depth player.
Mewhort (knee) is healthy and ready for the start of training camp, Kevin Bowen of ESPN reports.
Mewhort suffered a season-ending knee injury last year, but he participated in spring practices and isn't expected to be limited at the start of camp. He may receive some veteran rest days but otherwise should be a full go. He'll be competing for the starting job at right guard.
The Colts have been careful with Mewhort in his return from last year's season-ending knee injury, but it doesn't look like he'll be under any restrictions when training camp opens in late July.