The Cleveland Browns have listed defensive end Ahtyba Rubin questionable for Sunday's season opener vs. the Miami Dolphins.
Rubin, one of the league's more productive defensive linemen, is battling a calf injury and missed Friday's practice. Second-year pro John Hughes will take his spot if he's not able to go, reports Mike Wilkening of PFT.
As an interior lineman, Rubin had more than 80 tackles in both 2010 and 2011. He missed three games last season, ending up with 44 tackles, defended two passes and notched two sacks.
Also questionable on the defense is cornerback Buster Skrine (shoulder). If he sits, the week one job goes to former Atlanta Falcons CB Chris Owens.