Sources: Panthers acquire DE Jared Allen in trade with Bears

— -- The Carolina Panthers have acquired defensive end Jared Allen from the Chicago Bears, sources have confirmed to ESPN.

Fox Sports originally reported news of the trade. Allen is flying to Carolina to take a physical, a source told ESPN NFL Insider Adam Schefter.

The Bears will pay $11.5 million of Allen's salary, while the Panthers will pay him $823,000, sources told ESPN.

The move comes on the same day the Panthers announced that defensive end Charles Johnson will miss this week's game against the Tampa Bay Buccaneers with a severe hamstring injury.

Allen, a five-time Pro Bowl selection, transitioned from defensive end to outside linebacker in the offseason to fit Chicago's new 3-4 style of defense. The 33-year old pass-rusher won a starting job in the preseason, but never looked comfortable operating out of a two-point stance.

Allen was credited with one assisted tackle in 30 snaps in Chicago's 26-0 loss to Seattle on Sunday. His best play of the year occurred in Week 2 when Allen intercepted a Carson Palmer pass near the line of scrimmage.

Information from ESPN.com Bears reporter Jeff Dickerson contributed to this report.