SEATTLE — Marcus Mariota was finally contained Saturday. He was trapped, boxed in. It took two concrete walls, a narrow walkway in between and a few dozen reporters in his path, but finally Mariota was stopped.

Mariota, Oregon’s quarterback and the increasingly clear Heisman Trophy front-runner, spent much of the afternoon unobstructed. He dodged linebackers and fooled cornerbacks in the Ducks’ 45-24 victory over Washington. He threw for 366 yards, ran for 88 yards and accounted for four touchdowns. One run took the shape of an S. Finishing a sixth straight game without a turnover, he has compiled 25 touchdowns on the season.

Afterward, with microphones and notepads shoved inches from his face, bringing him finally to a halt, Mariota shrugged off questions about whether he had impressed himself and whether he could appreciate this type of performance, the superhuman kind. He made it sound routine, and that was exactly how it looked for Mariota and the Ducks (6-0, 3-0 Pacific-12).

The coach Mariota flummoxed this week was Steve Sarkisian, who opened his news conference by saying his team had battled.