RIO DE JANEIRO -- Imagine a horse race that starts on a ramp about three stories high, then winds down a quarter-mile track with as many bumps and twists as a roller-coaster ride.But instead of riding horses, eight competitors are pedaling frantically on bikes, and the race only takes about 40 seconds.Welcome to BMX racing.The fun at the Rio de Janeiro Games starts Thursday with the mens quarterfinals at the Olympic BMX Center.Youre in this starting gate and its being let out of the gates and everybody goes, U.S. rider Alise Post said. After that youre riding the roller coaster. Everything happens fast out there.But with hills and bumps made of varying heights, and 180-degree turns that riders maneuver on wide, sloping berms.Its really a big kind of a roller coaster adrenaline rush is what it is, said Posts teammate, Corben Sharrah.BMX, which stands for bicycle motocross, traces its roots to Southern California in the late 1960s and early 1970s. An action sport once considered a niche activity is now in its third go-around at the Olympics.It was added in 2008 in Beijing as a way to attract younger viewers with its frenetic, anything-can-happen pace.Even the most seasoned riders still get nervous when they get behind the starting gate.You get on top of that hill when you load the gate and theres always some kind of nerve, said Sharrah, who won the U.S. Olympic trials. He earned the fifth seed in the quarterfinals following the seeding runs on Wednesday .But its a good nerve, Sharrah said. Its kind of that nervous (energy) that feeds what you train for every day.Once cyclists break the starting gate, theyre free to jostle for inside position. Joris Daudet of France, who has the top seed in the quarterfinals, compared a race to a 110-meter hurdle race, but minus the lanes.You can go everywhere you want, Daudet said. Its like a sprint but everyone can change lanes.The competition is Rio is spiced up by a visually appealing track with bright green turns and finely groomed straights with surfaces that look like a baseball infield.The track plays fast, most riders said Wednesday.Its probably the fastest track weve ever had, said David Graf of Switzerland, who is seeded second in the mens draw.American Brooke Crain called the track one of the best that shes been able to ride. She will be seeded seventh when the womens draw resumes racing on Friday.Its just fast, Crain said. The jumps arent terribly big, so its a good racing track.Its still a bumpy ride. The bikes dont have suspension. Crashes arent uncommon.American cyclist Connor Fields isnt fully recovered from a broken bone in his left hand, an injury he sustained in the spring. But Fields, who is seeded fourth, is using a specially designed brace on the hand for the Olympics.What we do is pretty intense to begin with, Fields said. It takes a lot of mental health. You just have to get over that fear and go for it.---Online:AP Summer Games: http://summergames.ap.org/---Follow Genaro Armas at: https://twitter.com/GArmasAPMariners Jerseys 2019 . But now that hes in the NHL, the Calgary Flames centre showed big improvement in that department by scoring the winner in the eighth round of a 5-4 shootout victory over the Winnipeg Jets on Monday. Seattle Mariners Shirts . Kiriasis and brakeman Franziska Fritz finished two runs in one minute 55.41 seconds -- a mere 0.01 seconds ahead of Meyers and Lolo Jones, who likely bolstered her Olympic hopes by helping give USA-1 a huge push in the second heat. https://www.cheapmariners.com/ . Scott Kazmir allowed four hits in seven shutout innings, Michael Brantley hit a two-run homer in a three-run first inning and the Indians maintained their hold on an AL wild-card spot with a 4-1 win over the Houston Astros on Saturday night. Seattle Mariners Store . Still, Brewers manager Ron Roenicke thought taking him out before the fifth inning was an unusual move. "Im looking up at the board and hes got two hits given up and one run, and Im taking him out after the fourth inning," Roenicke said. Stitched Mariners Jerseys . -- Anaheim Ducks captain and leading scorer Ryan Getzlaf has been scratched from Sunday nights game against the Vancouver Canucks because of an upper-body injury. Thanks to the Cleveland Indians, Robert Griffin III isnt the only quarterback being talked about in the city this week.With the news that former NFL QB Tim Tebow is looking to pursue a career in baseball, the Tribe used the controversial topic as a way to troll their fans Tuesday afternoon.Unsurprisingly, the image of Tebow in an Indians jersey received plenty of reaction from followers. The teams ever-loyal hockey brethren -- thee Columbus Blue Jackets -- even chimed in to offer their support.ddddddddddddMeanwhile, the Cleveland Browns have yet to share their thoughts.Perhaps Tebow could give the Indians, currently in first place by 2 1/2 games in the American League Central, an extra boost in their quest to make the playoffs. ' ' '