Tom Goldman

Bolt passed all challengers to win the men's 100 meters in Rio for an unprecedented third time. He's attempting to do exactly what he did in 2008 and 2012 — win the 100, the 200 and the 4x100 relay.

There's no shortage of excitement in Olympic sport. Everywhere, it seems, there's adrenaline and athleticism on full display. So is there such a thing as a boring Olympic sport?

Swimming sensation Michael Phelps added to his gold medal tally and, for the first time, an African-American female swimmer won gold. And, the U.S. women continued their dominance in gymnastics.

Wins by Katie Ledecky and Michael Phelps have helped American swimmers dominate the competition in what is proving to be an exceptional Olympic showing.

The Russian athletes competing in the 2016 Summer Olympics have made strong showings in men's gymnastics and women's swimming. But fallout from an earlier doping scandal taints any accomplishments.

Michael Phelps added to his Olympic record, winning a 19th gold medal on Sunday night, while American Katie Ledecky smashed her own world mark in the 400-meter freestyle at the Summer Games.

American men are the defending champion in rugby — a sport that's coming back after being dropped following the 1924 Games. The U.S. women are considered contenders in the fast seven-on-seven game.

A shorter, faster version of the sport is making its Olympic debut 92 years after rugby was last in the Olympics. And women's rugby is making its first appearance ever.

Confusion surrounds many Russian athletes in Rio, whose status to compete in the Olympics remains unclear. Individual sports federations are trying to determine who's eligible to compete with only days left before the games begin. Some athletes have appealed their suspensions.

The Russian scandal is a hot topic at the U.S. track and field Olympic Trials. Some feel individual Russian athletes should be allowed to compete if they're clean, others support a blanket ban.

The country's top track and field athletes are competing in Eugene, Ore., over the next several days — running, jumping and throwing for a chance to represent the U.S. in this year's summer Olympics.

Michael Phelps got a DUI, some bad press and time in rehab since the 2012 Olympics. And that helps explain why he decided to come out of retirement and compete in his fifth Summer Games.

U.S. swimming icon Michael Phelps finds renewed vigor in an attempt to return to the Olympics.

At trials in Omaha, Neb., Phelps earned a trip to his fifth Olympics. Katie Ledecky, Leah Smith, Townley Haas and Kelsi Worrell are some of the younger competitors who will be joining him in Rio.

Everyone knows about the multimillion-dollar salaries and celebrity status of NBA players. But in the shadows of the NBA, men toil in the relative obscurity of the D-League to keep their dream alive.

The man considered the greatest boxer of all time inspired millions by standing up for his principles during the 1960s, and by always entertaining — in the boxing ring and in front of a microphone.

Tom Brady's four-game suspension by the NFL for reportedly deflating footballs is back on. The penalty was overturned by federal judge last summer, who agreed with Brady's argument that the penalty was unfair. But on Monday, a three-judge panel disagreed, saying the NFL was within its rights when it imposed the suspension.

There was a stunning end to the Masters golf tournament on Sunday. Last year's winner Jordan Spieth gave up a significant advantage, falling apart down the stretch and losing to Danny Willett.

Fans are buzzing after the thrilling end to the men's college basketball tournament. Villanova beat North Carolina at the buzzer, in a game many believe rescued a tournament that had gone flat.

Kansas is the overall No. 1 seed. North Carolina got another of the top spots. The other No. 1s, Virginia and Oregon, were considered surprises in some circles. The 68-team tournament starts Tuesday.