Byron Jones has his teammate's back.The defensive back took to Twitter to express his support for Randy Gregory, who is facing a suspension following his fourth failed drug test as a member of the Dallas Cowboys.Can't see the tweet? Tap here to view on a mobile device.The following is from SportsDay's David Moore on Gregory's suspension:"[Gregory] was hit with a four-game suspension earlier this year that still allowed him to take part in training camp and preseason games," Moore said.