Jeremy Maclin, seen here at OTAs in May, was carted off the field Saturday after tearing his ACL. (AP)
Updated at 5:25 pm.
Eagles wide receiver Jeremy Maclin suffered a torn ACL during practice Saturday at the NovaCare Complex and is expected to miss the 2013 season, a league source said.
Maclin, whose 3,453 yards since 2009 are third-most in franchise history by a player in his first four seasons, suffered a torn anterior cruciate ligament during the second full-team practice of the Chip Kelly era.
Maclin was carted off the field Saturday about an hour into practice.
Maclin, a fourth-year wideout in the last year of his rookie deal, went down at the end of 7-on-7 drills and stayed on the ground for several minutes as the medical staff rushed to his aid.
He writhed in pain as the staff worked on his lower leg, with Kelly kneeling over him and general manager Howie Roseman standing nearby. After he made it to his feet, Maclin appeared to be bearing weight only on his left leg before settling into the motorized cart.
Maclin, who led the Eagles with 857 receiving yards and seven touchdown catches last year, had his face covered with a towel as the cart escorted him off the field and toward the door that leads to the NovaCare Complex clubhouse.
Two trainers helped Maclin off the cart and then assisted the receiver in walking into the clubhouse as Maclin continued to avoid putting weight on the leg. Maclin had each arm wrapped around a staff member as he entered the complex.
Early Saturday night, he tweeted: "Appreciate all the love and support twitter fam....sad day but I have setbacks my entire life. Minor setback for a MAJOR comeback! #birdgang"
Maclin, a 2010 first-round pick, is one-half of the team’s starting wide receiver tandem, lining up opposite Pro Bowler DeSean Jackson. The Eagles have several replacements, but none with his experience or track record.
Eight-year wideout Jason Avant is mainly a slot receiver. Others competing for roster spots are Riley Cooper, Damaris Johnson, Arrelious Benn, Riley Cooper, B.J. Cunningham, Greg Salas and rookies Ifeanyi Momah, Russell Shepard and Will Murphy.
Benn and Cunningham were already out of practice after suffering minor injuries in Friday’s practice that rendered each one day to day.
CSNPhilly.com's Reuben Frank contributed to this story.