The intent of Total QBR is to isolate each NFL quarterbacks contribution to his teams fortunes as accurately as possible with the data available. It measures nearly every aspect of quarterback play, from passing to designed runs to scrambles to turnovers to penalties. QBR also strives to separate the performance of the individual quarterback from the rest of his team, all in an effort to rate the overall efficiency of each quarterback in the league.One thing it hasnt done, however, is to account for the strength of the 11 players on the other side of the line of scrimmage.But now, QBR accounts for opposing defenses: Quarterbacks who face tougher defenses will have their ratings adjusted upward in proportion to the difficulty of their opposition, and those who face weaker defenses will have their ratings adjusted downward. This is one more step toward gaining a true measure of overall quarterback performance -- and a big step.Heres how the opponent adjustment works. Early in the season, we dont have enough information on how good each defense truly is. It usually takes several weeks of data to have a reasonable estimate of how tough each defense is. So the adjustment starts with an estimate for each defense, which is based on a model of how defensive performance varies from one season to the next. Then, as each week is played, we update that estimate with performance information from each game. The result is an accurate and relatively stable estimate of how tough each defense is for a quarterback to face. Several weeks into the season, the effect of the early estimate becomes very small, and by the end of the season it is virtually nonexistent.Next, we compute an adjustment to each quarterbacks performance based on those estimates of how tough each defense is. We also factor in home-field advantage. Its no surprise that quarterbacks playing at home tend to have an easier time than those playing on the road. These adjustments are made underneath the hood of QBR -- on each quarterbacks share of his teams expected points added (EPA) per play, which factors in nearly all aspects of quarterback play, including passes, scrambles, designed runs, sacks, turnovers and even some penalties. Those EPA rates are also adjusted to correct for performance in garbage time, when the games outcome has effectively been decided.Lastly, those adjusted EPA rates are scaled to produce the final opponent-adjusted QBR, which is a number from 0 to 100. This scale can be thought of as a percentile of game-level performance -- 50 is average and a 99 would be among the best games on record. Quarterbacks dont often get below a QBR of 5 (theyll get benched by that point). On a season level, a QBR of 75 or higher would be elite performance, and 25 would be considered replacement-level performance.Early in the season, the opponent adjustment will have the most impact since many quarterbacks have faced an imbalanced set of opposing defenses. Some examples will help explain how the adjustments affect the ratings.Through Week 3 in 2016, Ryan Tannehills unadjusted raw QBR of 53.0 suggests he has been playing at a league-average level. But his adjusted QBR of 62.2 is significantly higher, highlighting how difficult his opponents have been so far. The Dolphins have faced the Seahawks and Patriots, both on the road, plus the Browns, whose defense so far has been middle of the pack.Drew Brees exemplifies the opposite. Through Monday night, his opponent-adjusted QBR is 52.7, lower than his unadjusted raw QBR of 57.5. His Saints have faced the Raiders, Giants and Falcons, all three in the bottom-third of the league in terms of defensive QBR allowed, with two of three games at home.By the end of the season, most starting quarterbacks have faced an evenly balanced set of opponents, so their adjusted and unadjusted QBRs will be very close. But there are exceptions, and those are the interesting cases. For example, in 2015, one reason the Panthers were able to finish the regular season 15-1 was that they faced a disproportionate number of weaker defenses. The difference between Cam Newtons unadjusted raw QBR of 70.3 and his adjusted QBR of 65.1 (retroactively calculated) reflects the relative weakness of his opponents.On the game level, the adjustments are usually more stark. Matt Ryans recent Monday night game at New Orleans was among the weeks best performances with a raw QBR of 92.4. But because the Saints defense is among the leagues easiest for quarterbacks to face, Ryans opponent-adjusted QBR for that game falls to 87.8.Jacoby Brissett, the Patriots rookie fill-in, had a storybook debut against the Houston Texans, who have one of the leagues most formidable defenses. His raw QBR for the game was 62.1, but after opponent adjustment, it becomes 70.7. The highest-rated game since 2006, when QBR began, is a 99.8 by Colin Kaepernick in the 49ers 42-10 win against the Jaguars in 2013.Jacksonvilles defense was near average that season, so Kaepernicks raw and adjusted QBR are the same. Kaepernick was 10-for-16 with a TD and no interceptions, but this is where QBR and the traditional passer rating diverge. Kaepernick absorbed no sacks, never fumbled, rushed for 54 yards on seven carries, and added two rushing TDs. Remember that QBR is a measure of efficiency, rather than total production, and this game is almost as efficient as it gets.The new, adjusted QBR is now the number youll find under the Total QBR column on the QBR page. The unadjusted QBR is now called raw QBR and is still available for all seasons and games. No player rating system can be perfect, but we think adjusting for opposing defenses is one more step forward for measuring total quarterback performance. Fernando Valenzuela Jersey .J. -- Josh Cribbs was in the Pro Bowl in February and out of a job six months later. Cody Bellinger Jersey . JOHNS, N. http://www.cheapdodgersjerseys.com/?tag=cheap-sandy-koufax-jersey . It just didnt show when he hit the ice. Berra made 42 saves and Kris Russell scored at 1:32 of overtime, lifting the Calgary Flames to a 3-2 victory over the Chicago Blackhawks on Sunday night. Cheap MLB Jerseys Authentic . -- On the field, it was business as usual for Jameis Winston and No. Hyun-Jin Ryu Jersey . The Court of Arbitration for Sport ruling "puts an end to my dreams of being a top player," the 27-year-old Troicki said in a statement. "I worked my entire life for it, and it has been taken away from me in one afternoon by a doctor I didnt know," said Troicki, whose ranking peaked at No. Match factsDecember 16-20, 2016 Start time 9.30 local (0400GMT)Big PictureEngland might feel like the guy sighing in relief when he hears the bar keep yelling last call. Theyve tried hard to keep up in unfamiliar surroundings, lost players to a schedule that packed five Tests into six weeks, given up their hold on the Anthony de Mello Trophy, and cant be faulted if they are left with nothing more than the desire to go home. Counting the series in Bangladesh, theyve been on tour since early October. With one win, four losses, debate over the quality of their captain, suggestions they have fielded lopsided XIs, injuries - James Andersons soreness being the latest - irritation from the coach over their tactics, and later at the medias antics, this was one awful bender.India, on the other hand, may feel kinship towards those who go boo when told the pub is shutting down for the night. Virat Kohli is in such form he could start playing trick shots to each ball. R Ashwin cant help but pick up wickets. The batting line-up stretches to No. 9. The bowlers are relentless. All of that has been amplified by home conditions. In Chennai, they stand a chance at equalling the most Tests theyve ever won in a series - four, against Australia in 2013 - even a draw would take them to 18 matches without a defeat. No Indian team has reached such heights in 84 years of Test history.There is one more protagonist in play: the city. It was only at the start of this week that Chennai was laid waste by cyclone Vardah.Form guideIndia WWWDW (completed matches, most recent first) England LLLDLIn the spotlightKarun Nair has not had the kindest introduction to Test cricket. He has had to hang around on the fringes since the Sri Lanka tour last year, and his extended run in the XI may well be the result of Ajinkya Rahane - who spent a lot longer waiting for his first gig - and Rohit Sharmas injuries. Scores of 4 and 13 - not to mention dropping a catch in the fourth over in Mumbai and then watching the reprieved Keaton Jennings make a century - indicate he has not made the most of his opportunity. Hell be eager to set that right should he get another go in Chennai.Since his century in Rajkot, Moeen Ali has not made the kind of contributions that befit his talent. His strokes appear effortless, which look nice when the ball flies off the middle and particularly ugly when it is mistimed. His showing more care at the start of the innings might not be too bad an idea. Hes the kind of player who goes the extra yard as well. Took on a vicious workload in Mumbai, bowling 53 overs and then had to bat at No. 4. Can he sign off on a high?Team newsIndia might play successive Tests with the same XI for the first time under Kohli, unless they take thee call to play Ishant Sharma, who has rejoined the squad after his marriage last week.ddddddddddddIndia (probable) 1 KL Rahul, 2 M Vijay, 3 Cheteshwar Pujara, 4 Virat Kohli (capt), 5 Karun Nair, 6 R Ashwin, 7 Parthiv Patel (wk), 8 Ravindra Jadeja, 9 Jayant Yadav, 10 Umesh Yadav, 11 Bhuvneshwar Kumar/Ishant SharmaEngland will likely hand a debut to left-arm spinning allrounder Liam Dawson. They are also waiting on Stuart Broads fitness - he injured his foot in Visakhapatnam and has not played since. He underwent a fitness Test on Wednesday and was scheduled for another on the eve of the Test.England (probable) 1 Alastair Cook (capt), 2 Keaton Jennings, 3 Joe Root, 4 Moeen Ali, 5 Jonny Bairstow (wk), 6 Ben Stokes, 7 Jos Buttler, 8 Liam Dawson, 9 Stuart Broad/Chris Woakes, 10 Adil Rashid, 11 Jake BallPitch and conditionsCan the behaviour of a pitch that has been through a cyclone and had to be dried by hot coals be predicted? Clearly there was concern over the amount of moisture there was in it. So the ball could seam around. It is Chennai though, the hometown of R Ashwin, so there will be plenty of spin. The rains have subsided, and it was sunny again on the eve of the Test before becoming a bit cloudy in the evening. Considering the work that has been put in by a dedicated groundstaff to make sure the match happens, the first ball could carry more far more meaning than the last.Stats and triviaEngland have played eight Tests in Chennai, winning three and losing four. India, meanwhile, have won 13 out of 31 matches at the venue.Kohli has 640 runs from four Tests in this series, 135 more in Chennai would give him the record for most runs by an Indian in a series, beating Sunil Gavaskars tally of 774 against West Indies in 1971.Ashwin has 27 wickets so far, with nine more he could record the best haul by an Indian bowler in a Test series. BS Chandrashekar took 35 against England in 1972.Alastair Cook needs two more runs to become the 10th batsman in Test history to 11000 runs.QuotesThis will be my 140th game and Ive never played a in a game when we havent had nets before. But sometimes you do have to remember what happened in the cyclone, when people unfortunately lost their lives. So a net session the day before doesnt seem quite as important after what people have gone through. Englands captain Alastair CookI dont think we are looking at a collective series as 4-0. 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