Jamie Carragher says Mamadou Sakho has let himself and Liverpool down badly over an alleged anti-doping violation. Sakho, 26, is being investigated by UEFA for allegedly failing a drugs test prior to the Reds Europa League second-leg tie at Manchester United on March 17.The centre-back has not been banned by Liverpool but will not be selected during the investigation, which is understood to be into the use of a fat-burning substance. Sky Sports football expert Carragher says serious questions must be asked of Sakho and any professional footballer who turns in a failed sample.Its a nightmare for the player, former Liverpool star Carragher told Sky Sports News HQ.I think hes let himself and the club down badly, because hes become a really important player.Theres serious questions to be asked of him.Hes had a great campaign. Hes one of the leaders of the team now, certainly within that run, thinking about how well he played in the Manchester United and Borussia Dortmund games. Its now how Liverpool fill that void.For a professional footballer, as in any sport, its not acceptable. Carragher, who made over 700 appearances for Liverpool during a 19-year senior career, also questioned whether footballers are given spot-doping tests regularly enough. Jamie Carragher has questioned whether players are tested regularly enough He said: How much is enough, or too much? As a player it would happen two or three times a season. People might say thats not enough.But there seems to be a lot more of that goes on in other sports, not something youd expect from football. Also See: Huge risks of fat-burners Toure backs Sakho Sakho probed Weekend ref watch Carlos Sanchez Moreno Jersey . -- The Tampa Bay Lightning are disappointed, though not discouraged. Frank Fabra Jersey . "It was awesome," he said. Coming off an ugly three-game sweep at the hands of the Yankees, Toronto found itself in a deep hole early after the Reds put an eight spot up on starter Liam Hendriks (six runs in 1 2/3 innings pitched) and Todd Redmond in the second. http://www.nationalcolombiafootball.com/...ersey/.Brothers B.J. and Justin Upton each homered and had an outfield assist, and the Braves held on for a 4-2 victory over the Philadelphia Phillies on Saturday night. Juan Fernando Quintero Jersey . GQ Lundqvist quite well.Three rounds, and nearly two months later, will the Kings have the strength to reach the summit of the Empire State to claim the cup?Truer words have never been spoken. Abel Aguilar Jersey . 1 Pete Sampras. Speaking ahead of an exhibition match against Andre Agassi in London on March 3, Sampras said on a conference call Wednesday that he is impressed by Federers longevity.The Winnipeg Blue Bombers have signed two import players; defensive back Gabe Loper from South Alabama and linebacker Kenny Tate from Maryland. Details of the agreements are not disclosed. Loper played 2011 and 2012 on the defensive side of the ball, racking up 52 tackles with three interceptions and three broken up passes. The 23 year-old also played some wide receiver in 2013 with South Alabama. Tate had a five-year career at Maryland, where he played a variety of positions on defence and was a first-team all-ACC selecttion following his junior season.ddddddddddddThat year, he recorded 100 tackles, 3.5 sacks and three interceptions while being a real force on defence. In the 2011 season, he racked up 35 tackles and two interceptions in the first four games, before suffering an injury. His senior season saw him record 42 tackles, 6.5 for loss, and four quarterback sacks, after missing the first three games. The 23 year-old played in two Bowl games during his tenure – the 2008 Humanitarian Bowl, and the 2010 Military Bowl. ' ' '