IRVING, Texas -- The Dallas Cowboys released defensive linemen Corvey Irvin and Everette Brown and offensive linemen Ray Dominguez and Jeff Olson on Friday, freeing up less than $1 million against the cap.

Brown played in seven games last season and had seven tackles in a sack after joining the team on Oct. 29. Irvin joined the Cowboys on Nov. 12 and had five tackles. Dominguez spent last year on the practice squad and was signed to a futures’ deal after the season ended. Olson suffered a concussion in training camp.

The Cowboys will have more work to do to get under the 2014 salary cap, which is projected at $133 million, but will be able to take care of most of that with restructuring of contracts, like those of Tony Romo, Sean Lee and Orlando Scandrick. The biggest decision will be in relation to DeMarcus Ware, who is set to count $16 million against the cap.