Watson (back) has been ruled out for Sunday's game against the Commanders, Jim Wyatt of the Titans' official site reports.
Watson was a DNP in practice all week, and as a result he will miss a third straight game due to a back injury. His next chance to play will be Week 14 against the Jaguars on Sunday, Dec. 8. Nicholas Petit-Frere will likely start at right tackle Sunday due to Watson's injury.