According a report from Les Bowen, the Philadelphia Eagles will be without Evan Mathis for a while. The team placed the All-Pro lineman on injured reserve with a designation to return later in the 2014 NFL season. Note that injured reserve, designated to return is only able to be used by a given NFL team once per season.
Mathis is eligible to return to practice in six weeks and can return to game action as soon as eight weeks. This means he won't be eligible to play until the Eagles November 10th game against the Carolina Panthers at the earliest.
Mathis being placed on injured reserve leaves opens up a roster spot for the Eagles' signing of veteran offensive lineman Wade Smith. Mathis has been diagnosed with an MCL sprain, which typically takes several weeks of recovery.
Mathis was injured in Week 1's win against the Jaguars. He made his first Pro Bowl last season after his outstanding performance in 2013. The veteran has played for the Eagles for four seasons after serving as an early-career journeyman. Mathis has played at an All-Pro level throughout his entire tenure with the Eagles and signed a five-year deal in 2012.
With a designation to return, Mathis should be back in action for the second half of the season. His return will be important if the Eagles are set to make a playoff run.
In other offensive line news, it's been reported that fill-in starting right tackle Allen Barbre is scheduled to have season-ending surgery on his ankle. If that's the case, Barbre will likely end up on injured reserve.