Philadelphia Eagles tight end Cornelius Ingram underwent a procedure to drain a Baker's cyst from behind his left knee, the team announced on Thursday.

Ingram (6-4, 245) was chosen in the fifth round (153rd overall) of the 2009 NFL Draft out of Florida, despite missing his final season in college with a torn ACL in his left knee. Ingram tore the ACL again during training camp last August, and had been experiencing tightness in his left calf.

An ultrasound detected a build-up of fluid, which the medical staff told Ingram would "bust like a balloon on its own". A precautionary MRI on Wednesday revealed the cyst, which has been drained.

No word from the Eagles on how long Ingram will be sidelined.

According to MayoClinic.com, a Baker's cyst "is a fluid-filled cyst that causes a bulge and a feeling of tightness behind your knee", which worsens when the joint is fully extended. A Baker's cyst "is usually the result of a problem with your knee joint, such as arthritis or a cartilage tear."

Ingram will not travel with the team for their pre-season game against the Kansas City Chiefs on Friday ngiht.