Cowboys placed C Ryan Cook on injured reserve with an undisclosed injury, ending his season. Cook failed his pre-camp conditioning test, but this is the first we've heard of an injury. Going into the final year of his contract, it's an inglorious end to Cook's star-crossed Cowboys career. An 11-game fill-in starter for Phil Costa last season, Cook was slowed by knee and hamstring ailments along the way.

Cowboys C Ryan Cook has been cleared to practice. Cook failed his pre-training camp conditioning test, but returned to practice on a limited basis Tuesday. The Cowboys have officially removed him from the NFI list.

Cowboys C Ryan Cook (knee) has not practiced all week with knee injury and is officially listed as doubtful on the injury report. There's still a chance that Cook plays on Sunday, but it's looking likely he sits out. Guard Mackenzy Bernadeau has taken the majority of the reps with the first team this week and is expected to make his first career start at center. Veteran backup Derrick Dockery will go at right guard with Bernadeau at center.

The Cowboys have ruled out C Ryan Cook (hamstring) for Sunday's game against the Panthers. Cook has yet to return to practice. With Phil Costa (probable, hamstring) back in the starting lineup, Cook won't be guaranteed playing time when healthy. David Arkin will serve as the Cowboys' emergency center.

Cowboys reportedly acquired C Ryan Cook from the Dolphins for an undisclosed draft pick. The compensation is expected to be a seventh-round pick. The Dolphins will shed Cook's $1 million salary while handing the backup job to undrafted rookie Josh Samuda. Cook started 40 games over six seasons with the Vikings before joining Miami. The desperate Cowboys will count on Cook as insurance for shaky starter Phil Costa.

Vikings agreed to terms with OL Ryan Cook. Charlie Johnson doesn't count as insurance for RG Anthony Herrera (ACL surgery) if he's locked in at left tackle. Cook brings versatility and experience to the table, but not much else. He could open the season as the starter if Herrera isn't ready.