LOS ANGELES, Calif. - UFC veteran Chael Sonnen retired from mixed martial arts a day after confirming he failed a recent drug test. Sonnens bout with Vitor Belfort at UFC 175 in Las Vegas next month was scrapped after Sonnen tested positive for two banned substances. The 37-year-old Sonnen (28-14-1) says he took the substances to ease his transition off testosterone replacement therapy, which was banned by the Nevada Athletic Commission earlier this year. Sonnen has lost three of his last four fights, including UFC title shots against Anderson Silva and Jon Jones. Sonnen lost all three of his career UFC championship fights. He made his UFC debut in 2005. He announced his retirement Wednesday on Fox Sports, where he serves as a UFC commentator. Darryl Sittler Jersey . JOHNS, N. Dave Keon Jersey .Just like old times.Only this time, just one got to enjoy a victory.James return to Miami as an opponent was a success — for the Heat, that is. Wade scored 24 of his 31 points in the first half, Luol Deng had 25 points and dogged James defensively all night, and the Heat beat the Cleveland Cavaliers 101-91 in a hyped Christmas matchup Thursday. http://www.officialmapleleafspro.com/Joh...e-leafs-jersey/. As Valanciunas was whistled for a rare technical toward the end of the third quarter - a result of waving his hand at an official after being called for a foul - Lowry pulled the Raptors sophomore aside, corralling him by his jersey and patting him on the back. Mitchell Marner Jersey . Grimes signed a $32 million, four-year contract to remain with Miami. The deal, which includes $16 million guaranteed, rewards Grimes for his recovery from an Achilles tendon injury that forced him to miss almost all of the 2012 season. Tie Domi Jersey . -- The Chicago Bears have agreed to a one-year contract with cornerback Kelvin Hayden.IMATRA, Finland -- Canada is off to the semifinal round at the world under-18 hockey championship, thanks to Travis Konecny. Konecnys third-period goal earned Canada a 3-2 quarter-final victory over Switzerland on Thursday. He scored with 30 seconds remaining in regulation after Switzerland had tied it earlier in the period. Switzerland pulled goalie Gauthier Descloux for the extra attacker afterwards but couldnt beat Canadian netminder Mason McDonald to force overtime. "I think its the same old story, were finding a way," Canadian team coach Kevin Dineen said after the game. "But weve got to do a much better job of showing up the way we play. "Hockey Canada put together some good character players and some talented players. I think weve survived on our talent, now we have to start relying on a little more character." Canada, which finished the preliminary round atop Group A, faces the Czech Republic in the semifinals Saturday in Lapeenranta, Finland. The Czechs, who were second to the U.S. in Group B, advanced with 3-2 quarter-final win over Russia here. John Quenneville and Jake Virtanen had the other goals for Canada, the defending tournament champion. McDonald stopped 19 shots. Dominik Diem and Kevin Fiala replied for Switzerland, which outshot Canada 21-17 but was just 1-for-7 on the man advantage. "Our penalty kill really stood out and I give a lot of credit to our defence, they had a really solid game," Dineen said. "That group really made a difference for us, it was a really satisfying win from that perspective." However, Dineen felt his players didnt make things easy for themselves throughout the game. "Undisciplined penalties, I thought, were an issue for us," he said. "We put ourselves in a lot of disadvvantages, not just in terms of manpower but wearing out the body over and over.dddddddddddd. "Also, our puck decisions have to be better, both in our defensive zone and at the opponents blue-line. I think we were just a little bit too cute and it kept on coming back on us." Diem opened the scoring at 7:50 of the first before Virtanen tied it on the power play at 17:28. Quenneville, a second cousin to Chicago Blackhawks head coach Joel Quenneville, had the lone goal of the second, putting Canada ahead 2-1 with an even-strength marker at 11:58. But the Swiss tied it again on Fialas power-play goal at 15:43 of the third, setting the stage for Konecnys late-period heroics. "We got the right guys on the ice and fortunately ended up with the puck," Dineen said "Even though it wasnt overtime it was pretty dramatic nonetheless. "I thought the Swiss played a heck of a game, they were the better team for stretches. We mightve learned a pretty good lesson and survived this one. Were not going to be that fortunate against the Czechs. Were going to have to change the way we do our business to have that success." Dineen saw some of the Czech Republic-Russia game and was impressed with the Czechs resilience. "I thought in all honesty the Russians played very well but obviously they (Czechs) are a worthy opponent and found a way to stick around," Dineen said. "Theyre pesky and at the end of the night ended up with the win." The Americans take on Sweden in the other semifinal Saturday. The U.S. beat Slovakia 6-2 in its quarter-final game while the Swedes advanced with a lopsided 10-0 victory over Finland. The semifinal victors will meet Sunday in the tournament final after the losers square off in the bronze medal game. 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