CBS Sports’ Jason LaCanfora reports via twitter this morning that Cleveland Browns center Alex Mack will not be signing a contract extension anytime soon.
Also, Browns standout C Alex Mack will play out his rookie deal. No contract talks; he's not open to deal in-season league source said
— Jason La Canfora (@JasonLaCanfora) September 8, 2013
The Browns are well over $20 million dollars under the salary cap. They could be as high as $29 million under.
It is not uncommon for players or teams to cut off negotiations during the season.
Alex Mack was drafted in the first round of the 2009 NFL draft. He has started all 64 games in his NFL career and never missed a snap. In 2010 Mack was named to the NFL Pro-Bowl.
[Related: Do the Browns have too much cap space?]