Morris ruled out Blount again after he missed practice all week in London.
Blount injured his knee during the first half of the Bucs' 48-3 loss to the San Francisco 49ers in Week 5 and has not played since then. Earnest Graham, who coach Raheem Morris has nicknamed 'Insurance' Graham, is expected to start in place of Blount. The eight-year vet rushed for 109 yards last week against the New Orleans Saints.
Morris said center Jeff Faine was doubtful after missing practice this week with an arm injury. Wide receiver Sammie Stroughter will be a game-time decision.
The Associated Press contributed to this report.