Source: Wrist injury for Patriots CB Darryl Roberts threatens his season

FOXBOROUGH, Mass. -- Promising New England Patriots rookie cornerback Darryl Roberts sustained a wrist injury in the preseason opener against the Packers on Aug. 13 that is significant enough to possibly threaten his season, sources tell ESPN's Mike Reiss and Adam Caplan.

Roberts, a seventh-round draft choice out of Marshall, started the preseason opener (five tackles) and was vying for a reserve role on the roster. His playmaking ability had caught the attention of some of his teammates, as he consistently got his hands on the football in practice.

Roberts' injury thins depth at a spot where the Patriots are transitioning without 2014 starters Darrelle Revis and Brandon Browner.

Malcolm Butler is a prime candidate to start at left cornerback, while the job on the right side appears to be wide open. That's where Roberts played in the preseason opener and had shown promise in training camp practices prior to sustaining the wrist injury.