Premiership Rugby bosses have called for a swift resolution to the unsustainable Test season.The Aviva Premierships chief executive Mark McCafferty has challenged rugbys top administrators to thrash out a new long-term deal to solve conflict in the global calendar.The existing international fixture agreements expire after the 2019 World Cup in Japan, with New Zealand hinting they would refuse a renewal under the current status quo.Guinness PRO12 chiefs have suggested delaying the start of the RBS 6 Nations by six weeks to allow club seasons to be completed in advance - but McCafferty insisted Premiership Rugby do not consider that a solution.Rejecting the pain of moving the Six Nations, McCafferty said: We dont like that particular idea, but we do have some of our own ideas and concepts.But we think that the best thing to do is to get all the main stakeholders in one building at one time and to work through it, because weve got some fairly strong views ourselves about separating the club and the international calendar more.Thats the next part of our development, to try to get a greater distinction there between the international and the club game.Thats one concept, but weve also got to listen to others. I think the international season structure is unsustainable as it is at the moment.Its coming to a head for sure. Were talking about what happens after the World Cup in Japan in 2019, so weve got to focus a few years out.There are parts of the global game where there is opportunity that needs to be developed, and opportunity needs to be given to certain parts of the game that are potentially growing.And as ever there are some threats to the game which need to be addressed. So all of those have got to go into the mix, and I think thats coming to a conclusion.But I dont think you can really make any progress by just lobbing out individual ideas there, without getting in a room and trying to work through it.Its very complicated, its very inter-related, and nobody really can act unilaterally, weve got to do it collaboratively.Premiership Rugby officially launched its new season at Twickenham on Thursday, revealing a new deal to run until 2020 with long-term sponsor Land Rover.While the Celtic and Italian PRO12 league has already confirmed it will explore the potential to add a franchise in the United States, Premiership Rugby will not.McCafferty insisted the Premiership will not expand its teams beyond England, but also reconfirmed plans to stage another league fixture in the US in the coming campaign.We are an English league, thats where our strength is. Weve certainly no plans to change, he said. Well look to grow our profile in the States for sure, and weve made a couple of big breakthroughs on that last season.Its about gaining profile for the Premiership competition in the States rather than basing any teams there.Were just putting together some last-minute details on our fixture in the US for the season. It will be a few weeks before were able to confirm everything, but it will happen.Air Force 1 Clearance . Here are his mid-season NBA awards. MVP: (KEVIN DURANT-Thunder) - Has been sensational this season and more importantly, the most consistent player in the league. Considering that his team has been without star guard Russell Westbrook and with the free agent departure of sharpshooter Kevin Martin, hes had to carry the majority of the load to not only keep his team afloat but more importantly, at an elite level. Air Force 1 High Outlet . "Trying to breathe," he said with a grin. 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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.WASHINGTON -- Stephen Strasburg is getting a different type of shutdown, a stint on the disabled list because of a strained muscle in his back. The Washington Nationals placed their top-of-rotation pitcher on the 15-day DL on Wednesday after he was unable to make a scheduled bullpen session. "Theres still some tenderness and discomfort there," manager Davey Johnson said. "So were going to keep him off the mound for a few more days." Strasburg was removed after two innings in his last start, Friday against the Atlanta Braves, because he was grimacing and flexing his shoulder. He said after the game that his back had been bothering him while warming up for his previous few starts but would feel fine once the game started. The Nationals said on Sunday that Strasburg has a "slight strain" to the lat muscle. Johnson was hoping the right-hander would not miss a start, although Strasburgs next turn in the rotation was moved back two days to Saturday. After Strasburg played catch instead of throwing the bullpen session Wednesday, the Nationals put him on the DL, retroactive to Sunday. Strasburg is 3-5 with a 2.54 ERA. He was 15-6 with a 3.16 ERA last season, when the Nationals madde the much-debated decision to shut him down before the playoffs because of a team-imposed innings limit in his first full season following elbow surgery.dddddddddddd The Nationals now have two starters on the DL. Ross Detwiler has been sidelined since May 15 with a strained oblique muscle. He threw a bullpen session Wednesday and will make a rehab start in the minors before returning to the rotation. Nate Karns has made his first two major league starts in Detwilers place, and Johnson said the Nationals will promote another pitcher from Triple-A Syracuse to start in Strasburgs place on Saturday. A prime candidate is right-hander Ross Ohlendorf, who has pitched for three major league teams and is 4-5 with a 4.32 ERA at Syracuse. The Strasburg news overshadowed a cosmetic change for Johnson: The manager arrived at the dugout clean-shaven for the first time in more than two weeks. Johnson had been refusing to shave because of the Nationals hitting woes, but he broke out the razor in the wake of his teams first late-inning come-from-behind win of the season. The 3-2 victory over the New York Mets on Tuesday was the first time in 2013 that Washington won when trailing after six innings. ' ' '