Oregon–Oregon State football rivalry

Though not officially recognized by the universities, the Platypus Trophy is awarded annually to the winning team’s alumni association.

"[5] With athletes, alumni, and boosters questioning the name, usage of the "Civil War" name was discontinued in 2020 amid a wave of name changes sparked by the George Floyd protests.

The Beavers scored first, but the rest was all Oregon, with fullback (and future Chicago Cardinal) "Iron Mike" Mikulak rushing for 89 yards on the way to a 13–3 victory.

A Beaver win at Hayward Field would give them a share of the conference title, but since the Beavers had been to the previous season's Rose Bowl, the Pacific Coast Conference's no-repeat rule meant that no matter what, the Ducks were headed for Pasadena on New Year's Day, their first Rose Bowl appearance since January 1920.

[12][14] 1969: With the score tied at seven and less than a minute left, Oregon State placekicker Mike Nehl attempted a 29-yard field goal to put the Beavers ahead.

Nehl again came on to try his fourth field goal, and this time, connected on a 21-yard kick to give the Beavers a 10–7 win—the sixth on the way to what would be eight straight OSU wins in the series.

1983: Played during a torrential rainstorm and pitting two mediocre squads against each other, the game ended in a scoreless tie, and is commonly known as the "Toilet Bowl" due to the very poor standard of play in the game, which featured eleven fumbles (six for turnovers), five interceptions, and four missed field goals.

It was also the last Division I football game to end in a scoreless tie, with the NCAA instituting overtime rules in 1996.

1987: Oregon earned what was at the time the most lopsided victory in the series, a 44–0 drubbing led by Ducks quarterback Bill Musgrave.

[12] 1994: Oregon needed a win at hostile Parker Stadium to secure a bid to the Rose Bowl, but trailed 13–10 in the fourth quarter.

Quarterback Danny O'Neil took the Ducks on a 70-yard drive that culminated in a 19-yard pass to Dino Philyaw for a 17–13 win and their first Rose Bowl in 37 years.

Oregon State was extended an at-large invitation to BCS' Fiesta Bowl, where they defeated Notre Dame 41–9.

With ESPN's College GameDay staged in Corvallis for the first time, the Ducks won 37–20 to secure a spot against Auburn in the national title game.

The game was one for the history books, with Oregon rolling to a 69–10 win, setting records for the series in both points scored and margin of victory.

After dropping behind by 12 entering the fourth quarter, Jermar Jefferson led the Beavers to an improbable 41–38 win on a foggy night in Corvallis in front of an empty stadium, knocking the Ducks out of playoff contention and notching the Beavers' first victory over a ranked opponent since 2014.

2023: In the last matchup as Pac-12 conference opponents, Oregon won their 8th consecutive game of the series at home by a score of 31-7.

The UO's public relations department spread stories of Oregon Agricultural College hooliganism to the statewide press, offending students of OAC and causing the rivalry to be suspended for 1911.

[20] 1954: Approximately 50 UO students infiltrated Corvallis and lit the traditional OSU homecoming bonfire early.

[21] The captured students had their heads shaved, were painted orange and black and some were forced to do menial labor for OSU fraternities.

The Oregon State student body president was served a ransom note, asking him to ride a bicyle or scooter to UofO and invite the Ducks to the Civil War game.

1972: After a 30–3 UO victory at Corvallis which ended an eight-game win streak in the series by the Beavers, Ducks fans stormed the OSU field to take down goal posts; after taking down the south goalposts, Beavers fans attempted to defend the north goalposts, resulting in a large brawl.

Police used a photo of the incident from the Portland Tribune to arrest a University of Oregon student and charge him with riot and several misdemeanors.

1908 Beavers v Ducks game at Multnomah Stadium, Portland
1908 illustrated game program, pitting the Oregon Agricultural College Aggies against the University of Oregon Webfoots.