OLYMPICS

RIO DE JANEIRO (AP) With the Rio Olympics set to open, worried IOC members grilled top organizing officials about traffic jams, water pollution, security, and the absence of signage that gives the games its own distinct look.

International Olympic President Thomas Bach also turned up the pressure by talking straight to organizing committee president Carlos Nuzman and CEO Sidney Levy, who tried to soothe almost 100 IOC members.

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Prince Albert of Monaco asked about Rio's severe water pollution, which soils Olympic venues for sailing, rowing, canoeing, triathlon and open-water swimming. Rio treats about half of its raw sewage, dumping the rest into the waters surrounding the area of 12 million people.

RIO DE JANEIRO (AP) - Michael Phelps has a lot of memorable moments at the Olympics.

This one ranks right up there.

Adding another honor to his remarkable career, Phelps was chosen to carry the U.S. flag in Friday night's opening ceremony at Maracana Stadium.

The pick seemed obvious - Phelps, after all, is the most decorated athlete in Olympic history and will be competing in his fifth Summer Games - but he was clearly overwhelmed Wednesday after being selected in a vote of American athletes representing each sport.

RIO DE JANEIRO (AP) - The first Olympics in Brazil are underway - aptly with soccer games in the sport's spiritual home and a win for the hosts.

In Rio de Janeiro's Olympic Stadium, the Brazilian women's team eased to a 3-0 victory at the start of its quest for a first Olympic gold.

It's an early sporting high for Brazil, where reservations about the cost of bringing the Olympics to South America for the first time have produced violent reactions.

As the Olympic torch relay reached Rio, there were fresh signs that strife could disrupt the games. Police used tear gas to break up protests against salary delays for public workers. Other protesters are demanding improvements in education and healthcare, with some angered by the $12 billion - a mix of public and private money - being spent on building venues and infrastructure for the Olympics.

NFL

SANTA CLARA, Calif. (AP) - The San Francisco 49ers signed linebacker NaVorro Bowman to a four-year contract extension through the 2022 season.

The 28-year-old Bowman missed the 2014 season after a devastating left knee injury during the NFC championship game, then returned last year and led the NFL with 154 total tackles. He also had 2 1/2 sacks and two passes defensed, earned first-team All-Pro honors and was a Pro Bowl selection.

GLENDALE, Ariz. (AP) - On what he called ''a proud day,'' Tyrann Mathieu added a rich chapter to his remarkable comeback story by signing a five-year, $62.5 million contract extension.

The deal makes him one of the highest-paid defensive backs in the game.

Although an initial report put Mathieu's guaranteed money at $40 million, a person close to the situation clarified that the player was guaranteed $21.25 million at signing, including a $15.5 million signing bonus. The rest of the money is ''guaranteed'' if he's on the team in later years of the deal.

BASEBALL

NEW YORK (AP) - Mets slugger Yoenis Cespedes is going on the 15-day disabled list because of his strained right quadriceps.

Cespedes went 1 for 5 as the designated hitter in the Mets' 9-5 Subway Series loss to the New York Yankees on Wednesday night. He started for the first time since Saturday, and Mets manager Terry Collins had hoped Cespedes' leg had healed sufficiently to allow the All-Star outfielder to be the DH during five consecutive games this week in AL ballparks.

The Mets said after the game that Cespedes will be put on the disabled list Thursday and rookie outfielder Brandon Nimmo will be recalled from Triple-A Las Vegas.

DENVER (AP) - Dodgers ace Clayton Kershaw, sidelined since late June with a herniated disk in his back, was moved to the 60-day disabled list.

That means the 28-year-old won't be able to return until Aug. 27, at the earliest.

Los Angeles manager Dave Roberts said the three-time Cy Young winner hasn't participated in any baseball activity since he suffered a setback in a simulated game July 16.

The move corresponded with right-hander Louis Coleman (shoulder fatigue) and left-hander Adam Liberatore (elbow inflammation) being put on the 15-day DL. The Dodgers have placed 25 different players on the disabled list year, a National League record.

GOLF

BEAVERTON, Ore. (AP) - Nike is getting out of the golf equipment business, a surprising announcement that is sure to send Tiger Woods, Rory McIlroy and other players searching for new clubs and golf balls next season.

Nike said it would stop making clubs, golf balls and golf bags, instead devoting its resources to shoes and apparel, longs its strength in the golf marketplace.

Woods has been with Nike since he turned pro in 1996 with that ''Hello, World'' advertisement, and he remains the most famous figure among Nike golfers. The Beaverton, Oregon-based company also signed Rory McIlroy in a splashy announcement in Abu Dhabi to start the 2013 season.

TENNIS

ATLANTA (AP) - John Isner opened his bid for a fourth straight BB&T Atlanta Open title with a 6-4, 6-0 win over France's Adrian Mannarino.

The 6-foot-10 former University of Georgia star has reached the finals in Atlanta five of the previous six years and is 21-3 in the event. He has 10 ATP Tour titles.

In the quarterfinals, Isner will face face eighth-seeded Taylor Fritz in an all-American match. Fritz topped American Bjorn Fratangelo 4-6, 6-4, 6-2 in the late match.

Seventh-seeded Donald Young and fellow American Reilly Opelka set up a quarterfinal matchup in the afternoon session. Young beat countryman Tim Smyczek 4-6, 7-6 (1), 6-3, and 18-year-old Opelka upset third-seeded Kevin Anderson of South Africa,6-7 (5), 6-3, 7-5. The 6-foot-11 Opelka had 20 aces.