Knees made headlines on opening Sunday, never a good thing in the NFL.Two impact players, Houston middle linebacker Brian Cushing and San Diego wide receiver Keenan Allen, were ruled out for their games Sunday and possibly the remainder of the season.Allen left the field on a cart after suffering what looked like a serious right knee injury with less than 2 minutes left in the first half. He could be lost for the season, a tough turn of events after Allen returned to play from a kidney injury that kept him off the field last season.Cushings diagnosis was only slightly more optimistic. He also hurt one of his knees but walked off the field under his own power. Cushing also missed significant playing time with a range of injuries in 2012 and 2013, but started every game last season.Giants linebacker J.T. Thomas III was also carted off, after spraining a knee on a kickoff return on the final play of the first half.In other injuries, Bucs defensive end Jacquies Smith was carted off the field with a right knee injury and ruled out for the rest of the game against Atlanta. Indianapolis defenders T.J. Green (sprained knee) and Patrick Robinson (medical evaluation) went down in the same series in the first half and stayed out for the rest of the game. Safety Winston Guy (ankle) also left late in the game and did not return.Detroits Theo Riddick left for a while to undergo the concussion protocol, but returned late in the game after being cleared.In Seattle, rookie running back C.J. Prosise sprained one of his wrists in the first half and wore a protective cast on the sideline, Seahawks coach Pete Carroll said. 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The nimble-footed quarterback got his wish, dashing through the snow and a weary defence all the way into the NCAA record book. RIO DE JANEIRO -- IOC president Thomas Bach defended the decision not to ban Russias entire team from the Rio Games, declaring Sunday that the doping crisis wont damage the Olympic bodys credibility and taking a swipe at global anti-doping officials for failing to act sooner against state-sponsored cheating in Russia.Speaking at a news conference five days before the opening of the Olympics in Rio de Janeiro, Bach said a total ban on Russia for systematic doping would not be justifiable on either moral or legal grounds.Every human being is entitled to certain rights of natural justice, said Bach, who also denied suggestions he had bowed to pressure from the Russian government to reject calls by anti-doping authorities for a complete ban.Bach was peppered with questions about the International Olympic Committees handling of the Russian scandal, including the decision to give international sports federations the authority to decide which Russian athletes should be cleared to compete in Rio.Asked whether the ruling represented a failure by the IOC, Bach said: No. This is for very obvious reasons.Bach said the IOC had set a very high bar by imposing strict conditions on the entry of Russians, including a ban on any athletes with prior doping sanctions.More than 100 Russian athletes -- including the track and field team -- have been excluded, with more than 250 declared eligible by the international sports federations.With the Games opening Friday, it remains uncertain exactly how many Russians will be competing. Some have filed appeals against their bans.I dont think that this in the end will be damaging because people will realize we have to take this decision now, Bach said. Imagine if we had not taken a decision, what limbo we would be in then.The IOC on Saturday set up a review panel consisting of three executive board members who will have the final say on which Russians are let into the Games, based on advice from an independent expert appointed by the Court of Arbitration for Sport.Pressure for a complete ban followed a World Anti-Doping Agency report by Canadian lawyer Richard McLaren that accused Russias sports ministry of overseeing a vast doping conspiracy involving the countrys summer and winter sports athletes.Despite the backlash against the IOC decision, Bach said the committee had broad support across the Olympic movement, including from national Olympic committees and sports federations.Of course the negative opinions are most likely to be quoted, he said.Bach took a shot at WADA, which was set up by the IOC in 1999, for not having acted earlier on whiistleblower evidence of widespread doping in Russia.dddddddddddd He also questioned why WADA had accredited the Moscow and Sochi doping labs at the center of the scandal.The IOC is not responsible for the timing of the McLaren report, Bach said. The IOC is not responsible for the fact that different information which was offered to WADA already a couple of years ago was not followed up. The IOC is not responsible for the accreditation or supervision of anti-doping laboratories.Therefore, the IOC cannot be made responsible, neither for the timing nor for the reasons of these incidents we have to face now ... just a couple of days before the Olympic Games.Bach said the IOC wants to shed full light on all the allegations in McLarens report, including evidence that Russian officials replaced tainted urine samples with clean ones during the 2104 Winter Games in Sochi.McLarens investigation has been extended so he can identify athletes and others involved in state-backed doping and cover-ups. Once McLaren finishes his work, then we will take all the further necessary sanctions, Bach said.The evidence published so far by McLaren was shocking, Bach said.If this system was applied like this, its an attack on everything we want to represent, he said. Its an attack on the Olympic Games and its an attack on our values.But Bach reiterated his position that it would be wrong to collectively sanction all Russian athletes because it would punish some who had no links to doping.How far can you go to punish an individual for the failures or manipulations of your government? he said. Is it possible to take an athlete and say, Because your government has done something wrong, you automatically are out? This would not be justifiable, neither on a moral ground, not to speak on a legal ground.Bach defended the decision to reject a bid by 800-meter runner Yulia Stepanova, a former doper and whistleblower who helped expose the extent of cheating in Russia, to compete in Rio as a neutral athlete, as proposed by the IAAF.It was not easy, he said. The executive board made it really clear that it appreciates the contribution of Yulia Stepanova in the fight against doping. We offered assistance and support which no other organization has so far offered.Bach said the IOC had targeted 2,200 athletes in pre-Olympic tests ahead of Rio, and that 4,500 urine tests and 1,000 blood controls would be conducted during the games, similar to the figure in London four years ago. ' ' '