Caelen Carson injury update is more bad news for Cowboys secondary

In this story:
Following Monday’s practice, the Dallas Cowboys worked out several cornerbacks, resulting in the signing of Christian Matthew.
With Trevon Diggs, Shavon Revel Jr., and Josh Butler all battling knee injuries, this felt like a move to fill out depth for training camp. As it turns out, the Cowboys were actually replacing a cornerback who suffered a knee injury.
Second-year defensive back Caelen Carson reportedly hyperextended his knee on Sunday and could miss up to six weeks, according to ESPN's Todd Archer.
MORE: Cowboys need Stephon Gilmore more than ever after latest DB injury
Carson was working his way back from offseason shoulder injury and was expected to play a large role while Diggs, Revel, and Butler continued to rehab their injuries.

A fifth-round pick out of Wake Forest, Carson was a preseason star who wound up being asked to start in Week 1 last season following a foot injury suffered by DaRon Bland.
Carson understandably had his share of ups and downs as he played in six games, with five starts. He recorded 27 tackles and four pass defenses.
MORE: Cowboys 'young core' gets middle of road NFL ranking despite untapped potential
In addition to their concerns at cornerback, the Cowboys lost Tyler Guyton to a knee injury on Monday.
Initially, it was feared he would miss the entire season with a torn ACL, but it turned out to be a knee fracture that will sideline him for 4-6 weeks.

— Enjoy free coverage of the Cowboys from Dallas Cowboys on SI —
Best highlights & videos from Cowboys sixth training camp practice
Tyler Guyton, Cowboys avoid worst case scenario after torn ACL fear
Cowboys' OL dominates line of scrimmage during sixth training camp practice
DaRon Bland, Cowboys contract talks 'ongoing' as he reveals future plans
153-pound KaVontae Turpin levels 332-pound Tyler Smith in training camp collision
PHOTOS: Brenley Herrera, viral Dallas Cowboys Cheerleader rookie

Randy Gurzi is a graduate of Arizona State and has focused on NFL coverage since 2014.