The Bills lost 22-9 to the Dolphins last week, and Orton completed 22 of 39 passes for 193 yards with no touchdowns and no interceptions. Buffalo has lost its last two games and is 3-3 since Orton replaced E.J. Manuel as the team's starting quarterback.
"Right now I'm sticking with Kyle [Orton], we'll go with who gives us the best chance to win," Marrone said.
In six starts this season, Orton has completed 64 percent of his passes for 1,580 yards, 10 touchdowns and three interceptions
Manuel was benched after the team started the season 2-2. He completed 58 percent of his passes for 838 yards, five touchdowns and three interceptions and has not played since Week 4.
Buffalo's offense is ranked No. 23 in scoring and No. 25 in yards this season.
The Bills are 5-5 and in third place in the AFC East. They host the Jets on Sunday at 1 p.m.
- Paul Palladino