The Big Ten announced Oregon and Washington would be joining the conference next August, and the Big 12 completed its raid of the Pac-12 by adding Arizona, Arizona State and Utah.

The result is a beleaguered league, which has now become a target of memes and jokes on the Internet.

Friday began with hope and nine members for the Pac-12. It ended with the Pac-12 — with roots that date back a century and more NCAA championships than any other — down to four schools and facing extinction because it was unable to land a media rights agreement to match its competitors.

“Today’s news is incredibly disappointing for student-athletes, fans, alumni and staff of the Pac-12 who cherish the over 100-year history, tradition and rivalries of the Conference of Champions,” the conference said in a statement. “We remain focused on securing the best possible future for each of our member universities.”

After the Big Ten paved the way Friday morning for the Pacific Northwest rivals to join, the Ducks were first to make it official with a unanimous vote by the school’s 13 trustees. The Big Ten a short time later said its presidents’ council had voted to accept Oregon along with Washington and become an 18-team coast-to-coast conference, with four West Coast members.

The Associated Press contributed to this report.