MRI results show that Philadelphia Eagles rookie cornerback JaCorey Shepherd has sustained a torn ACL in his right knee, reports ESPN's Adam Schefter. 

Shepherd was carted off the field after colliding with running back Darren Sproles during practice on Sunday, just over a week after the Eagles announced they had traded three-year veteran cornerback Brandon Boykin to the Steelers for a 2016 draft pick. 

The Eagles selected three cornerbacks in the 2015 draft: Shepherd (sixth round), Eric Rowe (second round) and Randall Evans (sixth round). Shepherd had been undergoing the most reps of the three rookies at the position. 

Jaylen Watkins, a fourth-round pick in 2014, is slated to take Shepherd's place at nickel cornerback. 

Philadelphia signed No. 1 cornerback Byron Maxwell to a six-year, $63 million contract this off-season.

The Eagles play their first preseason game against the Colts on Sunday. 

Report: Eagles fans did not hire plane that crashed in California

- Erin Flynn

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.