The International Olympic Committee is waiting for more clarification from the Russian government on the anti-gay law that is overshadowing preparations for the Winter Games in Sochi.

Tiger Woods made a mess of his final hole at the PGA Championship, hardly looking as though he's poised to break the longest major drought of his career.

The IAAF is determined to re-introduce four-year bans for serious drug violations and will be pushing the World Anti-Doping Agency to do the same to strengthen the deterrent against cheaters.

Already this year, there have been a couple of first-time major winners — Justin Rose and Adam Scott, who were scheduled to play in the afternoon with British Open winner Phil Mickelson.

The Major League Baseball Players Association formally appealed Alex Rodriguez's 211-game suspension, sending the case to an independent arbitrator.

Some of his troubles have been attributed to a wholesale equipment change, others to his decision to change management companies.

Nick Symmonds has become the first competitor at the world athletics championships to criticise Russia's anti-gay propaganda law.

Woods and Mickelson have never been especially close off the course, that sense of underlying animosity only adding to their rivalry.

MLB's investigators used an arsenal of high-tech tools to collect the evidence that persuaded a dozen players to accept 50-game suspensions this week for their ties to the Biogenesis clinic.