Zack Martin has already made a huge impact on the Cowboys’ season, and now he’s officially a Cowboy.
According to Todd Archer of ESPNDallas.com, Martin signed his four-year rookie contract Monday.
Martin has worked at both guard and center during Cowboys OTAs, but he was unfortunate to have been the guy blocking linebacker Sean Lee when Lee suffered a torn ACL earlier this offseason.
Second-rounder DeMarcus Lawrence is their lone remaining unsigned pick.