The Titans began their season at home against the Oakland Raiders.  Tennessee trailed early in the first quarter as Raiders kicker Sebastian Janikowski made a 34-yard field goal.  Tennessee would answer as quarterback Vince Young hooked up with wide receiver Nate Washington on a 56-yard touchdown pass, followed by kicker Rob Bironas nailing a 43-yard field goal.  The Titans would add onto their lead in the second quarter with a 15-yard touchdown run from running back Javon Ringer, followed by Chris Johnson's 76-yard touchdown run. Tennessee would continue its dominating day in the third quarter as Johnson got a 4-yard touchdown run.  In the fourth quarter, the Titans would wrap up their astounding performance with Young finding tight end Bo Scaife on a 1-yard touchdown pass.  Afterwards, Oakland would end the game with quarterback Jason Campbell completing a 7-yard touchdown pass to running back Darren McFadden.. How many touchdowns did Chris Johnson run for?