No. 3 Oregon hosts the upstart Arizona Wildcats as two of the nation’s top offenses square off in a Pac-12 showdown Saturday night at Autzen Stadium.

The game starts at 10:30pm and can be seen on ESPN, and you can watch a free live online stream at ESPN3 here.

The Ducks’s rush-heavy offense is fifth in the nation in scoring and seventh in total offense, demonstrating their power against Tennessee Tech last week with a 63-14 stomping.

Sophomore running back De’Anthony Thomas garnered 222 total yards on 10 carries, with two touchdowns.

This is Oregon’s second 4-0 start in four seasons, and their last such start was 2012 when they fell to Auburn in the national championship game.

Oregon, however, did commit 12 penalties for a loss of 105 yards, and threw two interceptions and lost fumble. Those turnovers cannot happen against Arizona who has a proven attack and will capitalize on any extra possessions.

New head coach Rich Rodriguez took over the No. 22 Wildcats last season and has turned the offense into a pass-centric force. Arizona is now fourth in the FBS with 604.7 yards from scrimmage, and routed South Carolina State 56-0 last Saturday.

Senior quarterback Matt Scott tossed three touchdowns and rushed for another in the first three quarters, and three Wildcat running backs rushed for at least 40 yards and a touchdown last week.

On the season, Scott has seven passing touchdowns with just one interception, to go along with 995 yards and a 71.5 completion percentage.

Betting Odds: Oregon is favored by 21.5 points; Over/Under: 80 points

Prediction:  Defense will not be a factor in this matchup, with Thomas and Scott running the score up for their respective teams. Oregon head coach Chip Kelly has rested most of his starters in the Ducks first three games, and should unleash the first string Saturday. Still, whichever team commits the final turnover could suffer their first loss of the season.

Predicted Score: Oregon 42, Arizona 21