COLUMBUS, Ohio (AP) - Record-breaking Ohio State running back J.K. Dobbins is leaving school early to enter the NFL draft.

Dobbins' decision was expected. He announced it in a Twitter post Monday in which he thanked everyone at the university and said "coming to Ohio from Texas has been nothing short of a dream."

Dobbins became the first Ohio State player to rush for 2,000 yards in a season. He finished with 2,046 yards and could have had a lot more but sat for the second half of most regular-season games because they were early blowouts. He was a 1,000-yard rusher in each of his two seasons with the Buckeyes.

He ran for 174 yards and a touchdown in Ohio State's 29-23 College Football Playoff semifinal loss to Clemson on Saturday but also dropped two passes that likely would have been touchdowns on drives that ended in field goals for the Buckeyes.

All-American defensive end Chase Young had previously announced that he would leave early to enter the draft. Young is expected to be a top pick.

PRO FOOTBALL

ASHBURN, Va. (AP) - Washington Redskins team president Bruce Allen was fired Monday after a tumultuous and loss-filled decade with the NFL team once coached by his father.

Owner Dan Snyder announced the move. From the outset of the 2010 season, the Redskins went 62-97-1 with Allen serving as owner Daniel Snyder's right-hand man, a stretch that featured only two playoff appearances and zero playoff victories - along with plenty of public relations disasters.

Allen was hired as Washington's executive VP and general manager in December 2009, then promoted to president in May 2014.

Despite playing in the league-worst NFC East, where every club has a losing record, Washington went 3-13 this season.

FORT LAUDERDALE, Fla. (AP) - Miami Dolphins cornerback Xavier Howard was arrested on a domestic battery charge following an argument with his fiance over the purchase of a purse, according to a police report.

Howard, who made the Pro Bowl in 2018 but missed much of this season with a knee injury, faces a possible suspension to start the 2020 season.

The police report from Davie, Florida, said the argument Sunday night became physical when Howard grabbed his fiance's arm and pushed her against a mirrored glass in the hallway of their bedroom. He let her go, causing her to fall to the floor on her right arm, which landed on his crutches, the report said.

Howard complained of pain due to his injury and was taken by Davie Fire Rescue to a hospital for treatment. He was later taken to the jail.

TENNIS

MELBOURNE, Australia (AP) - A day after Andy Murray put his Grand Slam comeback on hold, Japan's Kei Nishikori has become the latest high-profile player to withdraw from next month's Australian Open, citing a right elbow injury.

Tennis Australia issued a statement Monday saying Nishikori had withdrawn from the season-opening major at Melbourne Park and from the ATP Cup, a new international men's team event which starts next week and will be played in Sydney, Perth and Brisbane.

The world No.13, who has not played since a third-round loss to Australia's Alex de Minaur at the U.S. Open, required minor elbow surgery in the off-season.

COLLEGE BASKETBALL

CHAPEL HILL, N.C. (AP) - Brandon Robinson scored a career-high 20 points and Roy Williams tied his mentor on the all-time wins list as North Carolina beat Yale 70-67 on Monday night.

Justin Pierce added 14 points for the Tar Heels (8-5) in their final nonconference game of the regular season.

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