EUGENE, Ore. -- Chip Kelly's offense hasn't missed a beat so far without him.
Quarterback Marcus Mariota led the Ducks to a 59-14 victory over Tennessee on Saturday with a career-high 456 passing yards and four touchdowns.
Mariota threw for the third-most yards in school history and was the first Oregon quarterback to top 400 yards in a game since Kellen Clemens in 2005.
One of his favorite targets was freshman Johnny Mundt, who had five receptions for 121 yards and two touchdowns. Josh Huff had six catches for 125 yards and a TD.
The high-octane Ducks rolled up 687 yards of offense compared with the Vols' 316.
After Tennessee (2-1) jumped out to a 7-0 lead in the first quarter, Oregon (3-0) scored 59 consecutive points. The Ducks led 38-7 at halftime.
The Volunteers marched 80 yards in six plays after a missed Oregon field goal attempt to opening the scoring on quarterback Justin Worley's 5-yard touchdown run.
Oregon got on the scoreboard with a 38-yard field goal by Matt Wogan and then took the lead near the end of the first quarter when Mariota and Mundt hooked up on a 16-yard touchdown pass.
Mariota followed with a 9-yard touchdown run and then came back with a 54-yard touchdown pass to Huff. The sophomore quarterback again found the end zone on a 45-yard run before De'Anthony Thomas capped the first-half scoring with a 28-yard touchdown run.
The second half opened with Mariota finding Mundt again for a 17-yard touchdown strike. Oregon's Byron Marshall scored on an 11-yard run and freshman Thomas Tyner scored from 2 yards in the third quarter.
Tennessee's fourth-quarter touchdown came on an 8-yard run by Alden Hill.
Worley completed 13 of 25 passes for 127 yards and a touchdown in the game.
NOTES: Kelly left Oregon for the Philadelphia Eagles earlier this year and Mark Helfrich, Kelly's offensive coordinator for four years, took over as head coach. ... Oregon handed Tennessee its last non-conference loss in a regular-season game three years ago when the Ducks won 48-13 in Knoxville after trailing 13-3. ... Tennessee defensive lineman Maurice Couch did not play after he was ruled ineligible by the school for the game this week. The university is investigating a Yahoo! Sports report that Couch was one of five Southeastern Conference football players who received money from a former Alabama player acting as an intermediary between the players and agents or financial advisers.