RIO DE JANEIRO -- Swimming got off to a fast start in preliminaries at the Olympic pool on Saturday, with a world record in the mens 100-meter breaststroke, the second-fastest performance ever in the womens 400 individual medley and a defending champion knocked out.Adam Peaty of Britain lowered his own world mark with a time of 57.55 seconds in the 100 breast heats, leading 15 others into the semifinals later in the evening.Katinka Hosszu of Hungary just missed setting a world record in the 400 IM. Her time of 4 minutes, 28.58 seconds was the second-quickest ever in the event and just 15-hundreths off of Ye Shiwens mark of 4:28.43. Ye wont defend her Olympic title after she failed to qualify for the final. She finished 27th out of 33 swimmers.Katie Ledecky opened her Olympic program by swimming the anchor leg of the 4x100 freestyle relay. She rallied the Americans from third to second in their heat with the fastest 100 split (52.64) among teammates Amanda Weir, Lia Neal and Allison Schmitt.It just made the first swim of the meet a lot more fun than it normally is, Ledecky said. I think that bodes well for the rest of the week.Ledecky will try to sweep the 200, 400 and 800 freestyles for the first time since 1968 in her individual events.Overall, the Australian quartet of Madison Wilson, Brittany Elmslie and sisters Bronte and Cate Campbell qualified first in 3:32.39. The United States was next in 3:33.59, and Canada took third in 3:33.84. The Aussies are the defending Olympic champions, while the Americans havent won gold since 1996.In the 100 breast, Brazilian fans cheered wildly for Felipe Franca, who qualified third-fastest. Also moving on to the late-night semifinals were Americans Kevin Cordes (fourth) and Cody Miller (fifth).Peaty wasnt full of adrenaline until he walked on deck.You can either be shy of the arena or you can take advantage of it, he said. Going down that first 50, I knew it was fast, and I knew I turned fast. It wasnt until 25 meters to go, the crowd started to roar. I knew there were no Brazilians in this race, so theyve got to be shouting for something.Hosszu is seeking the first Olympic gold medal of her career, having long dominated at the world championships. She finished fourth in the 400 IM four years ago in London.In the mens 400 IM, Chase Kalisz of the United States had the top time of 4:08.12. Japanese teammates Daiya Seto and Kosuke Hagino were second and third, while American Jay Litherland was fourth in making the final.The grueling event featuring all four strokes -- butterfly, backstroke, breaststroke and freestyle -- was missing its two biggest stars. Michael Phelps, the world record holder and two-time Olympic champion, dropped the race for his fifth games and defending champion Ryan Lochte didnt qualify at the U.S. trials.Sarah Sjostrom of Sweden qualified fastest in the 100 butterfly heats with a time of 56.26. American Dana Vollmer, the silver medalist in London, was second in 56.56.A heat of the 400 freestyle included defending Olympic champion Sun Yang of China and 2012 silver medalist Park Tae-hwan of South Korea, both having served doping suspensions. Park finished 10th and didnt advance to the final.Sun had the fourth-quickest time of 3:44.23, behind top qualifier Conor Dwyer of the U.S. (3:43.42), Mack Horton of Australia and Gabriele Detti of Italy.In 2014, Sun served a three-month suspension for using a banned stimulant.Horton was asked about a reported incident between the two at the practice pool earlier in the week. The Aussie said Sun splashed me to say hello, and I didnt respond because I dont have time for drug cheats.In another 400 free heat, Miguel Duran Navia of Spain dived in too early, triggering an automatic disqualification.He slapped the water and hung his head on the lane line, realizing he was out of his only individual event. Duran appeared emotional as he picked up his clothing and walked off the deck while fans applauded in sympathy.Moments later, Duran reappeared and took his position on the starting block, having been given a reprieve.He said he heard a sound from the stands that caused him to false start.Duran finished seventh in his heat with a time that was five seconds worse than his personal best and failed to advance to the final.I was very nervous, my mind wasnt where it was supposed to be, he said. Robert Horry Jersey . - NASCAR announced a 33-race schedule for the 2014 Nationwide Series with virtually no changes from this years slate. Jamaal Wilkes Lakers Jersey . 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HOUSTON -- Playing with a seven-man rotation, Arizona coach Sean Miller admitted his team wore down late against Texas A&M.The Wildcats had just enough left to fight off the Aggies on Saturday.Dusan Ristic tied a season-high with 18 points as No. 19 Arizona had to hold off a furious rally by Texas A&M for its fourth straight victory, 67-63.We have seven scholarship players, and we hit around that 10-minute, 8-minute mark and guys start missing shots and defense is not that easy as it once was, Miller said. That is why depth is so critical. . When they sensed we were running out of gas, they put it into overdrive.Ristic scored 14 of Arizonas first 24 points and finished 8 of 12 from the field for the Wildcats (10-2), who shot 40 percent from the field, including 48 percent in the first half.Lauri Markkanen added 17 points and seven rebounds, and Kobi Simmons chipped in 14 points for the Wildcats.We were fortunate to hold on, but I also think we deserved to win, Miller said.Tyler Davis had 23 points and 10 rebounds, Robert Williams added 15 points and Admon Gilder had 13 points for the Aggies, who shot 45 percent from the field, including 53 percent in the second half.Texas A&M (7-3) had its three-game winning streak snapped.The Aggies mounted a rally over the final 5 minutes, using an 18-0 run to close within 65-63 with 22 seconds left on a 3-pointer by DJ Hogg.It demonstrates that we have the ability if we show effort on both ends of the court to win games against really good teams, Texas A&M coach Billy Kennedy said. Arizona was better than us for the majority of the game.But Rawle Alkins hit two free throws with 15 seconds left to put the Wildcats up by four.After the first one, I felt comfortable, Alkins said. Coach trusted me and Lauri to make the play happen.Tonny Trocha-Morelos missed a 3-pointer, and Davis missed the ensuing putback, allowing Simmons to grab the rebound and dribble out the clock.Arizona ended the first half with a 9-0 run led by Alkins five points to take a 41-28 lead annd carried that momentum into the second half, pushing the lead to as many as 22 points with a 17-8 spurt over the first 10 minutes of the second half.ddddddddddddTexas A&M didnt hit a field goal over the last 5:17 of the first half and shot 3 of 10 with eight turnovers to start the second half.For a large portion of the game, that was our best effort because we were playing against a really good team as well, Miller said.BIG PICTUREArizona: The Wildcats have continued to play well since losing to No. 8 Gonzaga on Dec. 3. Arizona defended well, forcing 14 turnovers and converting them into 18 points. The Wildcats were aggressive and attacked the paint, scoring 32 points.Texas A&M: The Aggies are still looking for a marquee win after falling to 0-3 against the Pac-12 this season. The Aggies allowed Arizonas post players to control down low until the final 10 minutes and couldnt take advantage of 15 offensive rebounds, scoring 13 second-chance points.POLL IMPLICATIONSArizona: The Wildcats could move up a couple spots after their fourth straight win.Texas A&M: The Aggies, who were receiving votes to start the season, will likely remain without votes.JACKSON-CARTWRIGHT UPDATEArizona junior guard Parker Jackson-Cartwright, who missed his fifth straight game Saturday with a high ankle sprain, is closer to returning, Miller said.We are anxious to get him back, Miller said. He is moving in the direction of coming back. If we can have a couple good weeks, we might get him back a little more to the beginning of the conference season.UP NEXTArizona: Hosts New Mexico on Tuesday before taking 10 days off ahead of Pac-12 play, which starts Dec. 30 at California.Texas A&M: Hosts Saint Francis (Pa.) on Wednesday before an eight-day break ahead the start of SEC play Dec. 29 against Tennessee.---More AP college basketball: www.collegebasketball.ap.org and https://twitter.com/AP-Top25. ' ' '