Robinson (concussion) has been ruled out ahead of Sunday's game against the 49ers, Travis Wingfield of the Dolphins' official site reports.
Robinson likely suffered his concussion in Sunday's loss to the Raiders. The third-year defensive end out of Penn State will not clear the NFL's concussion protocol in time for the Week 2 game against the 49ers, which would make a Week 3 matchup against the Chiefs on Sunday, Sept. 27 his next opportunity to retake the field.