Some of the sports stories The Associated Press is covering Monday. A full Sports Digest will be sent about 3 p.m. All times EDT:

- CHICAGO - A national labor board dismisses a ruling involving Northwestern football players that would have allowed college athletes to unionize.

- SHEBOYGAN, Wis. - In his eighth year on the PGA Tour, Jason Day reaches a major pinnacle by winning the PGA Championship. He has matured into one of the world's top three players and figures to stay there.

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- RIO DE JANEIRO - Mexico's sailing coach has some advice for sailors and windsurfers at this week's Olympic test event in Rio de Janeiro's polluted Guanabara Bay: Don't swallow any water.

- GENEVA - Olympic champion Asli Cakir Alptekin of Turkey gives up her 1,500-meter title and will serve an eight-year ban for blood doping. The agreement is approved by the top court in international sports.

- RICHMOND, Va. - Redskins President Bruce Allen makes clear the team will not reconsider a nickname change if it becomes a political barrier to building a new stadium in Washington or elsewhere.

- OXNARD, Calif. - The Rams are back in Southern California for joint practices with the Dallas Cowboys. Two decades after they moved to St. Louis, the Rams are weighing a return to Los Angeles next season.

- OXFORD, Miss. - A growing number of NCAA and NFL teams are dabbling in virtual reality technology to help supplement work on the field.

- College football previews on teams in the SEC West and Pac-12 North.

- ST. LOUIS - Michael Wacha, tied for the NL lead in wins, goes for his 15th victory when the first-place Cardinals play the Giants. San Francisco is 2 1/2 games back in the NL West. Game starts 8:15 p.m.

- CAPE TOWN, South Africa - Prosecutors pushing for a murder conviction against Oscar Pistorius file papers four days before the Olympic runner is expected to be released from prison and moved to house arrest.