As the Cowboys look to bolster their nose tackle position with Jason Ferguson out for the season with a torn right biceps, former Chicago Bears tackle Tank Johnson's name has come up, according to sources. On Tuesday, Cowboys vice president Stephen Jones would not comment on the team's potential interest in Johnson, who is serving an eight-game suspension for violating the NFL's personal conduct policy, but acknowledged that any player's off-field behavior is discussed. "That's part of the equation," Jones said. "On the field, off the field, medical, we look at all of that before we decide whether to sign anybody."