The Dallas Cowboys could have been a force to be reckoned with in the NFL last year if their defense was up to scratch.
The Cowboys tried to address that in the off-season, brining in explosive Byron Jones from UConn with their first round draft pick, whilst adding the talented-but-flawed Randy Gregory in the second round.
That all looked great on paper, but it seems that the Cowboys didn't bank on one thing, Jones' injury history, which could come back to bite them.
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According to a report from Todd Archer of ESPN, the cornerback suffered an injury to his left shoulder in Sunday's practice and had to be taken off the field to have it checked.
Jones is likely going to miss practices against the St. Louis Rams on Monday and Tuesday and could miss the second preseason game against the San Francisco 49ers.
Jones collided with fellow cornerback Morris Claiborne in a seven-on-seven drill Sunday and stayed down, reportedly clutching his shoulder. Medical personnel checked him for several minutes before the former Connecticut player left the field.
Here's why the Cowboys should be worrying though. Jones had season-ending left shoulder surgery in 2014, his final season at UConn.
Even though Cowboys general manager and owner Jerry Jones was upbeat about the injury, this has to be plaguing the minds in Dallas.
This leaves the Cowboys weak in the secondary, as they are now without cornerbacks Orlando Scandrick and Brandon Carr already, who are suffering from knee and hand knocks respectively.