DENVER (AP) The NFL says it is conducting a comprehensive review of allegations that Broncos quarterback Peyton Manning had human growth hormone delivered to his house.

There's no timetable to complete the investigation, but it's not expected before Denver plays Carolina in the Super Bowl on Feb. 7.

League spokesman Brian McCarthy said the inquiry, which began weeks ago, involves reviews of records, interviews and coordination with other agencies.

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Al Jazeera reported last month that an intern at an Indianapolis anti-aging clinic was secretly recorded suggesting that Manning's wife received deliveries of HGH, which is banned by the league. Manning, then with the Colts, was rehabbing from shoulder surgeries.

The intern, Charles Sly, has since recanted his story.

Manning angrily denied using performance-enhancing substances and called the report ''complete garbage.''

IOWA CITY, Iowa (AP) - Former NFL and Iowa safety Tyler Sash, who died last year at age 27, has been diagnosed with chronic traumatic encephalopathy.

Chris Nowinski of the Boston University-affiliated Concussion Legacy Foundation confirmed the diagnosis. The New York Times was the first to report the finding.

CTE, which can be diagnosed only after death, has been found in the brains of dozens of former football players. Linked to repeated brain trauma, it is associated with symptoms such as memory loss, impaired judgment, depression, and, eventually, progressive dementia.

Sash, who won a Super Bowl during his rookie season with the New York Giants, was found dead at his home on Sept. 8. The Iowa State Medical Examiner's office found he died from an accidental overdose after mixing two powerful pain medications, and a history of painful injuries was a contributing factor.

NBA

INDIANAPOLIS (AP) - Blake Griffin is expected to miss four to six weeks with a broken shooting hand after punching a Los Angeles Clippers staff member during a road trip.

The star forward underwent a procedure and was treated by an orthopedic surgeon after returning early to Los Angeles from the five-game trip, the team said. He has a spiral fracture of the fourth metacarpal in his right hand.

A person with knowledge of the incident said Griffin and equipment manager Matias Testi got into an argument during a dinner that escalated. The person spoke on the condition of anonymity because the Clippers had not confirmed those details publicly. Testi had multiple facial injuries.

About 90 minutes before Tuesday night's game at Indiana, coach Doc Rivers said he had spoken with Griffin. Rivers made it clear he wasn't happy with the situation.

TENNIS

MELBOURNE, Australia (AP) - Tennis authorities are taking steps at damage control as they grapple with recent media reports alleging match-fixing, which have cast a shadow over the first Grand Slam of the year and shaken confidence in the integrity of the sport.

An independent review of tennis' anti-corruption unit was announced in the wake of allegations that officials had failed to properly investigate suspected cases of match-fixing.

ATP Chairman Chris Kermode said immediate action was needed to ''restore public confidence in our sport.''

The creation of the review came 10 days after the BBC and BuzzFeed News published stories alleging that tennis authorities had suppressed evidence of match-fixing and failed to thoroughly investigate possible cases of corruption involving 16 players who have ranked in the top 50 over the past decade. No players were named in the reports.

COLLEGE SPORTS

CHICAGO (AP) - A federal judge gave preliminary approval to a reworked head-injury settlement between thousands of former athletes and the NCAA that includes a $70 million fund to pay for brain trauma testing and limits legal immunity for the nation's largest college sports governing body.

U.S. District Judge John Lee praised the new deal for expanding potential plaintiffs to athletes from sports beyond football, hockey and other contact sports. But he suggested several changes - most notably ones modifying what would have been a blanket protection for the NCAA from class-action lawsuits over concussions, something the organization may find unacceptable.

The core of the agreement remains largely the same. That includes the NCAA creating the fund to test current and former athletes for brain injuries they say they suffered while playing collegiate sports. The tests would gauge the extent of neurological injuries and could establish grounds for individual athletes seeking damages.

IAAF INVESTIGATION

LONDON (AP) - Qatar's bids for the 2017 and 2019 world athletics championships have been referred to the IAAF ethics commission for bribery allegations to be investigated, the head of UK Athletics said.

The 2017 championships were awarded to London, which defeated a rival bid from Doha, Qatar. Doha subsequently beat Barcelona and Eugene, Oregon, in the vote for the 2019 worlds.

UK Athletics chairman Ed Warner confirmed the referral to a British parliamentary committee, adding that ''I'm delighted at that and so my next conversation is going to be with that ethics commission to lay out all that I heard at the time.''

The IAAF ethics commission said in a statement to The Associated Press that it will be ''considering these matters raised by Ed Warner'' at the committee ''in accordance with the commission's procedures.''

OLYMPICS

RIO DE JANEIRO (AP) - The former CEO of World Sailing says he was fired for pushing to get rid of polluted Guanabara Bay as the sailing venue of the Olympics in Rio de Janeiro.

Peter Sowrey tried to change the venue, or at least have a ''B plan'' but says ''I was told to gag myself on the subject.''

Andy Hunt took over just two weeks ago as the new CEO, and sailing is still scheduled to begin in August in the sewage-filled bay.

In interviews with The Associated Press, Sowrey and Hunt said the bay - overlooked by the famous Christ the Redeemer monument and Sugarloaf Mountain behind it - may give sailing the kind of television coverage it seldom enjoys.

It could also bring unwanted attention if sailors fall ill, or if floating rubbish - plastic bags to door frames to animal carcasses - fouls rudders and costs someone an Olympic gold medal.