Updated at 6:18 p.m. ET
The Panthers have agreed to a three-year contract with OG-C Geoff Hangartner, NFL.com's Jason La Canfora first reported on Tuesday. The team later confirmed the signing.
Hangartner started all 16 games at guard last season with the Panthers, his second stint with the team. The 29-year old played his first four seasons in the league with Carolina, then spent two years with the Bills before returning to the Panthers in 2011.
Tha Panthers also released OG Travelle Wharton, who started 99 games over eight seasons with the Panthers.
"It was an extremely difficult decision on Travelle," GM Marty Hurney said in a statement. "He's been a tremendous player for us and he is a class act. It got to the point where in the big picture we decided it was a move we needed to make. We placed a June 1 designation on his release, which means we will carry his cap number until June 1, but Travelle is immediately able to negotiate and sign with another team."
Wharton's 99 starts and games played are second only to Jordan Gross among offensive linemen in franchise history.
The way we see it
Wharton brought value as a versatile lineman. He played inside and outside for Carolina, but the team needed to create some salary-cap flexibility and Wharton became a casualty.
Carolina has two quality starters on the O-line in Gross and C Ryan Kalil, and Hangartner is a dependable veteran that will likely stay at right guard. There's not great depth up front for the team right now, though, and that has to be a concern with QB Cam Newton counting on them for protection.