The Philadelphia Eagles released defensive tackle Mike Patterson on Monday, according to a report from ESPN's Adam Schefter.

Monday's release ends Patterson's eight-year career in Philadelphia. He developed into a mainstay at defensive tackle, starting 99 games during his first seven seasons. That changed last season, when Patterson missed the first eight games of the season after undergoing brain surgery during the offseason. He was originally expected to miss the entire season but returned to play in five games. The Eagles placed him on the non-football injury/illness list in December after he contracted viral pneumonia.

Patterson and the Eagles had some issues late last season after Philadelphia cut his salary after placing him on the non-football injury/illness list. By releasing him now, Philadelphia will save $3 million against their 2013 salary cap according to Spotrac. The 29-year-old Patterson played three seasons of the seven-year $33.5 million contract extension he signed in 2006.