MMA

LAS VEGAS (AP) Jon Jones has denied using any performance-enhancing substances after a positive drug test knocked him out of the main event at Saturday's UFC 200.

The UFC interim light heavyweight champion broke into tears at a hastily arranged news conference a day after his rematch with Daniel Cormier was canceled.

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''I would never take anything that would enhance my game,'' Jones said. ''Being labeled as someone who would ever cheat, it hurts me more than anything I've ever been through in my career.''

Jones' manager, Malki Kawa, said the fighter was informed of a possible PED violation by USADA, which administers the UFC's anti-drug policy. Jones' backup sample will be tested by a lab in Utah, and Kawa hopes to get the results later Thursday, although he has little hope the result will change.

BASEBALL

CHICAGO (AP) - A man was carted off Wrigley Field and hospitalized after he slipped and fell while attempting to jump from the bleachers before a game between the Atlanta Braves and Chicago Cubs.

The Cubs, who didn't identify the man, said in a statement the fan ''was injured after attempting to jump onto the field.'' They didn't provide his condition.

The man, dressed in shorts and sneakers, was face down just in front of the ivy in right-center field when officials started running from the dugouts to assist him. They immediately checked his pulse while a medic ran in from right field.

It took three people to turn the man over onto his back. They then pulled up his shirt and put on a brace to stabilize his neck before strapping him onto a backboard and loading him into a cart.

PRO BASKETBALL

OAKLAND, Calif. (AP) - Kevin Durant's big move to the Golden State Warriors is done.

The Warriors formally announced the signing of the six-time All-Star and introduced him with fanfare at a news conference at the team's downtown Oakland practice facility, where screens read, ''WELCOME KD TO DUB NATION.''

Durant announced his decision Monday in a story on ''The Players' Tribune,'' then Thursday marked the first day free agents could sign their deals. He joins the NBA runner-up Warriors - who rallied from 3-1 down to beat Durant's former Oklahoma City Thunder in a thrilling seven-game Western Conference Finals before losing the finals in seven games to Cleveland - on a two-year contract worth more than $54 million. There is a player option after the first year.

NEW YORK (AP) - Time's up for the old NBA shot clock.

The league will debut a new timing system and shot clock this week in Las Vegas during the NBA Summer League, which will then be integrated into all 29 arenas for the 2016-17 season.

The league says the new clock will feature the game clocks, 24-second and timeout, the first time they have all been in one piece of hardware.

Developed by Swiss watchmaker Tissot, the league's official timekeeper, the timing system will allow for clearer footage to assist referees and the Replay Center, and provides a benefit to some fans. The clock's LED glass is nearly transparent when in use, giving fans behind the baskets a view to the court that was previously obstructed.

The NBA introduced the shot clock for the 1954-55 season and it has been positioned on top of the backboard since 1977.

AUTO RACING

LINCOLNSHIRE, Ill. (AP) - Carl Haas, co-founder of Newman-Haas Racing with late actor Paul Newman, has died. He was 86.

His company, Carl Haas Automobile Imports Inc., posted a statement on its web site saying Haas died on June 29 at his home surrounded by family.

Newman-Haas established itself as one of the most successful open-wheel teams, hiring Mario Andretti as its first driver. Among its other drivers were Michael Andretti, Nigel Mansell, Paul Tracy, Sebastien Bourdais and Christian Fittipaldi. The Indianapolis Motor Speedway issued a statement Thursday describing Haas as one of the most influential men in motorsports for nearly a half-century.

Newman-Haas cars made 30 starts over a 28-year span at the Indianapolis 500 from 1983-2011, with six top-five finishes. He also fielded teams in in Can-Am, Formula 1 and NASCAR.

PRO FOOTBALL

CHICAGO (AP) - Pro Football Hall of Famer and former Heisman Trophy winner Paul Hornung is suing equipment manufacturer Riddell, saying its helmets failed to protect him from brain injury.

Attorneys filed the lawsuit on behalf of the 80-year-old Hornung in Cook County Circuit Court in Chicago. It names Rosemont-based Riddell as the defendant.

The suit says Hornung suffered multiple concussions as a player and that he has been diagnosed with dementia. It says the neurodegenerative disease has been linked to repetitive head trauma. The suit seeks unspecified damages.

Hornung won the Heisman in 1956 while at Notre Dame. The Green Bay Packers selected him a year later. He was the NFL MVP in 1962 and he played on four championship teams (1961, `62, `65 and `66).

Riddell didn't immediately respond to a request for comment.

CANTON, Ohio (AP) - CBS broadcaster James Brown has won the Pete Rozelle Radio-Television Award presented by the Pro Football Hall of Fame.

The award recognizes long-time exceptional contributions to radio and television in professional football.''

Brown will be presented with the award at the hall's enshrinement ceremony Aug. 6.

Brown hosts ''The NFL Today'' on CBS, and ''Thursday Night Football,'' aired on CBS and NFL Network. He's a three-time Emmy Award winner. He also is a special correspondent for CBS News and contributes to programs such as ''60 Minutes'' and ''CBS This Morning.''

The award is named for former NFL Commissioner Pete Rozelle.

COLLEGE FOOTBALL

ANN ARBOR, Mich. (AP) - Notre Dame and Michigan, the two winningest programs in college football history, have agreed to resume their football rivalry.

The Fighting Irish will host the Wolverines on Sept. 1 2018, and the series will shift to Michigan Stadium on Oct. 26, 2019.

Notre Dame opted out of its series with Michigan in 2012, canceling games in 2015-2017. The Fighting Irish said at the time the move was a precaution as it began the process of a scheduling commitment to the ACC.