The Dallas Cowboys signed running back Rico Dowdle to a new deal in March to keep him around at least one more season. The former Gamecock started his career with injuries but is now standing out in a crowded room of running backs as he heads into his fifth year in the league. Head coach Mike McCarthy revealed his thoughts on Dowdle ahead of the team’s final OTAs session before mandatory minicamp next week. “He’s had a good offseason, looks great,” McCarthy said on Thursday. “He’s done an excellent job honing his training. (Dowdle’s) very bright, very instinctive football player… He’s definite…