ORCHARD PARK, N.Y. -- Bills running back LeSean McCoy did not finish practice Wednesday after experiencing tightness in one of his hamstrings.Coach Rex Ryan didnt know the severity of the injury by saying the teams top offensive threat was still being evaluated by trainers. Ryan also wouldnt speculate on McCoys playing status for Sunday, when Buffalo (4-2) travels to play at AFC East rival Miami (2-4).We feel good about the guys that we do have, but thats assuming he wont play, Ryan said, when asked how McCoys possible absence would affect the game plan. Well see how it goes.McCoy has played a key role in sparking Buffalos four-game winning streak -- the teams longest in eight years. Its a stretch in which hes combined for 470 yards rushing and six touchdowns, including one receiving.In a 45-16 win over San Francisco , McCoy had 19 carries for 140 yards three touchdowns in a game Buffalo totaled 312 yards rushing, the fifth-highest output in team history.McCoy is in his second season in Buffalo after the Bills acquired the NFLs 2013 rushing leader in a trade with Philadelphia. McCoys production was slowed last year, when he opened the season with a partially torn left hamstring. He then missed the final two games of the season because of a knee injury.Ryan didnt say which of McCoys hamstrings was being evaluated.Mike Gillislee is McCoys backup followed by veteran free-agent addition Reggie Bush and rookie fifth-round pick Jonathan Williams.The Bills offense could also be missing starting receiver Robert Woods, who aggravated an injury to his right foot against San Francisco. Woods was still wearing a protective boot on Wednesday.Starting tight end Charles Clay also didnt practice after he hurt his ankle on Sunday.Buffalo is already playing without top receiver, Sammy Watkins, who aggravated an injury to his surgically repaired left foot last month. Watkins was placed on injured reserve and is not eligible to be activated for four weeks.---AP NFL website: www.pro32.ap.org and AP NFL Twitter feed: https://twitter.com/AP-NFLCheap Air Jordan From China .J. -- Pitcher Carl Pavano is retiring after 14 major league seasons. 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It was just enough to help lift Golden State to a 102-101 victory over the New Orleans Pelicans on Tuesday night.World champion Lewis Hamilton has dropped his strongest hint yet that he will finish his Formula 1 career with Mercedes. While Ferraris historic resonance proved an irresistible lure for Hamiltons long-time rival Sebastian Vettel 18 months ago when he engineered an early exit from Red Bull, the Englishman has drawn a different lesson from history to conclude his future should be with his present employers at Mercedes.I look at my team, the Silver Arrows, and think Im a part of this history which I will be for way beyond my time and I want to continue being a part of it. When I stop racing, I still want to be a part of it, Hamilton told Sky Sports F1 in an exclusive interview at Barcelona. Hamilton is in his fourth season with Mercedes after being persuaded in late 2012 to leave McLaren, the Mercedes-powered team for whom he had driven since boyhood, for an outfit which had previously won just one race in three years.What we wrote when Hamilton joined Mercedes: The potential winners and losers of Hamiltons transferThough considered a gamble at the time, Hamiltons decision has since proven to be one of the most inspired in motorsport history. While McLaren have failed to win a race since Hamiltons departure, their former protégé has flourished at Mercedes, ruthlessly exploiting the teams emergence as the sports dominant force to claim successive world championships to add to his 2008 title. Lewis Hamilton says he wont get involved in the blame game over who was responsible for his crash with team-mate Nico Rosberg in Spain Although Nico Rosberg and a deficit of 43 points still stands resolutely between Hamilton and the title summit this year, few are betting against the 31-year-old landing a fourth world championship in November.Little wonder, then, that Hamilton sees no reason to move - and every reason to stay.What I love about Mercedes when you look at Sir Stirling Moss, when you look at all drivers still today in their old age, they are still with Mercedes, youre with the brand for life, said Hamilton. They take you under your wing, they look after you, youre part of it forever. I cant imagine myself not being a part of that. Since Jenson Buttons 2009 title win, Hamilton and Vettel have won every F1 world championship. Yet, in a curious quirk of fate, F1s brightest stars over the last decade have stubbornly remained out of each others orbit. Neither has been runner-up to the other during any of their title-winning seasons and the remote possibility of Hamilton joining Vettel at Red Bull for the 2013 campaign was only fleetingly entertained before he signed for Mercedes.A vacancy is expected to emerge at Ferrari over the next 12 months with 36-year-old Kiimi Raikkonen in the final year of his Scuderia deal.dddddddddddd But with Hamilton already contracted to Mercedes for another two years and Vettel adamant that his attachment to Ferrari is a long-term commitment, there seems little chance that F1s pair of serial winners will ever go head-to-head as team-mates. But could Hamilton one day replace Vettel at Ferrari? Without a doubt when I grew up watching F1 I saw the red car, it looked awesome, mused Hamilton. A Ferrari, whether its a road car or an F1 car, look awesome. Theres something particularly very special with the Italian passion for that team. But Ive been with Mercedes since I was 13, more than most drivers at my age.I honestly dont, at the moment, look over at Sebastian in the Ferrari and think damn it I want his seat.Curiously, reports this week in Italy have claimed that Rosberg, out of contract at the end of the season, has opened talks with Ferrari over a potential transfer. The F1 gossip column Has Nico Rosberg opened talks with Ferrari? However, even after Hamilton and Rosbergs race-wrecking crash in Spain triggered fresh doubts about the long-term health of their partnership, the prospect of Rosberg voluntarily leaving Mercedes for a team currently struggling to stay ahead of Red Bull as the 2016 grids best of the rest seems remote. According to Sky Italys Antonio Boselli, the rumours are likely to be mischief making designed to destabilise the Silver Arrows.But one thing is for certain: Hamilton is in no mood to move home again. Lewis Hamilton and Nico Rosberg were involved in a dramatic crash on the first lap of the Spanish GP Mercedes in F1 - Their success story in statsFirst race as a works outfit: 1954Races since 1954: 132Victories: 49Pole positions: 58Podiums: 1021-2 finishes: 30World championships: Six (Four Drivers Championships, Two Constructors Championships) Every race live in 2016 Sky Sports F1 brings you every race live in 2016. Fast and easy online upgrade Also See: What was said when Lewis joined Merc What now for Hamilton-Rosberg? Every race live only on Sky Sports F1 Get tickets to the British GP ' ' '