HOUSTON — Miami Dolphins defensive tackle Christian Wilkins was last seen in a team setting of training camp dominating offensive linemen on his own team in an Aug. 5 scrimmage. Since, he has not participated in team drills in four practices entering Wednesday’s joint session with the Texans in Houston. That’s two joint practices against the Atlanta Falcons and a pair of intra-squad sessions, plus the preseason exhibition against Atlanta where starters were rested. Dolphins coach Mike McDaniel said Wednesday it’s due to contract negotiations between the team and its standout defensive lineman. “He has made it clear that he feels his play is deserving of a contract,” McDaniel said.