Gary Pinkel flipped the script.

He inherited a Missouri football program that lost 115 games in the 16 seasons before he arrived. He then won a program-record 118 games — and counting — in 15 seasons.

Pinkel announced Friday he would step down at season’s end to focus on his heath. His announcement sealed a tumultuous week in Columbia, a week that included protests related to alleged persistent acts of racism on campus and a massive change of university leadership.

Here’s a timeline of key events, beginning with a Sept. 11 encounter Payton Head, Missouri Student Association, had with a driver on campus that sparked the controversy.

Sept. 12: Head posts a message on Facebook, writing that the previous night a passenger in a pickup truck repeatedly directed racial slurs at him on campus. Head wrote that this wasn’t the first time he had encountered racism at Missouri.

Oct. 1: Black students protest alleged racism on campus.

Oct. 5: Missouri WR Nick Rhone tweets his disgust with the campus culture.

Oct. 8: Missouri Chancellor R. Bowin Loftin (who was later demoted) announces plan for online diversity training for students and faculty.

Oct. 10: Missouri students protest during homecoming. They blocked Missouri president Tim Wolfe’s car.

Oct. 15: Missouri’s Communication Department releases tweet condemning racism.

Nov. 2: Student Jonathan Butler begins his hunger strike to protest Missouri’s handling of the racial issues on campus.

Nov. 7: Several Missouri football players, including RB Russell Hansbrough, said they won’t participate in any football activities until president Wolfe resigns.

Missouri’s Legion of Black Collegians released a list of demands, including that Wolfe apologize and resign.

Hours later, Missouri’s athletic department responded, and calls for everybody to come together.

Nov. 8: Pinkel confirms that players are boycotting to show support and there was no practice Sunday.

Nov. 8: Pinkel sends this tweet in support of his players.

Nov. 9: ESPN reported that not every Missouri football player supported the boycott. The story quoted anonymous sources, including one who said even black players were upset about missing practice.

Nov. 9: Wolfe announces his resignation, encouraging students to use his resignation as an opportunity to heal and change. Loftin did not resign, but Missouri’s board demoted him.

Nov. 9: Butler ends his hunger strike.

Nov. 9: Boycotting Missouri football players say they will resume all football activities.

Nov. 11: DE recruit Sci Martin eliminates the Tigers from his final five, saying the racial unrest played a role in his decision. Martin is a 3-star recruit from New Orleans.

Nov. 12: Missouri names Michael Middleton, an African-America, interim president.

Nov. 13: Pinkel announces he is retiring at the end of the season.

Nov. 14: Missouri players huddle in prayer before their game against BYU, then score two fourth-quarter touchdowns to rally for a 20-16 victory.

“I’m very proud of our football team, all the adversity, everything that went down,” an emotional Pinkel told reporters afterward. “It means everything. That’s what you do this for.”

Editor’s note: Information from The Columbia Missourian was used in this report.