The problems that plague Andrew Luck are the same that hinder Carson Palmer and pretty much any other quarterback or team that was expected to light it up this year but hasnt.As much as an ailing receiver, hurting running back or bad play calling, a patchwork offensive line can carve into a teams efficiency, confidence and, ultimately, its win total.Indianapolis and Arizona were among the teams expected to reach the playoffs this season, but are now dealing with losing records in large part because of uncertainty in their offensive lines. They have given up the second and third-most sacks this season, respectively. Minnesota (11), Carolina (11) and Miami (12) lead the league in number of linemen used this season; only the Dolphins are playing well heading into December.Looking back to last year, I think we got through most of the year with the same guys, said Palmer, whose current line includes two players who werent starters when the season began and a third lineman playing out of position. This year, its been the exact opposite. Its been different guys, different spots, different weeks.Each team has 53 roster spots, and once coaches and GMs move beyond their main playmakers, they look for multi-faceted players who can back up in some positions and play special teams. Because offensive linemen arent common on special teams, the number of spots available for them are often limited -- usually seven or eight on a roster.Injuries are inevitable. That leads to juggling, shifting positions and adding new players. How well the new pieces fit into whats designed as a finely tuned machine, with centers shouting out play calls to the line much the way the quarterback does to the entire offense, can dictate whether injuries equal big trouble or a minor setback.It seems like its a broken record every year, said Colts coach Chuck Pagano, whose team has allowed 38 sacks so far -- one more than all of last season -- en route to a 5-6 mark. Luckily we have a bunch of guys that have some position flexibility and can play multiple spots, but it affects you.Aware of the beating their quarterback was enduring, the Colts used their first-round draft pick this year on a center, Ryan Kelly. He started the first 11 games, but injuries piled up around him. The Colts have used six different line combinations and one player, rookie Joe Haeg, has started at three different spots.It works the other way, too.The Titans started seven different tackles in 2014, en route to a 2-14 record, all of which put them in position to draft Marcus Mariota in 2015.But it was moves the Titans made last offseason that helped put Mariota in the position hes in today -- a half-game out of first place with the leagues third-best rushing attack and just 18 sacks allowed after giving up a league-high 54 last year.Tennessee signed free agent center Ben Jones, used the No. 8 pick on tackle Jack Conklin and traded receiver Dorial Green-Beckham to Philadelphia for tackle Dennis Kelly. None of these moves made headlines the way Mariotas selection did in 2015.But the Titans depth on the offensive line has made a difference.Getting (Kelly) with that trade was as big a trade as we had this year, coach Mike Mularkey said.Heading into Sundays game against Miami, Ravens coach John Harbaugh was asked about the Dolphins shuffled offensive line -- three starters have missed all or part of the last two games -- and immediately reflected on his own teams problems.We were ... cobbling together an offensive line and guys were playing out of position. Its very challenging, Harbaugh said. The really great offensive line coaches prepare for that.The Ravens started the same offensive line for the first three games of the season and went 3-0. Injuries set in, and Baltimore lost four straight -- part of a stretch of eight straight games in which they started a different line combination. They head into Sundays game having won three of four, as the idea of not knowing who theyre going to line up next to has become less jarring.Its definitely easier to have someone youve been playing with because you build chemistry over a period of time, said Ronnie Stanley, the Ravens first-round pick this season, who missed four games earlier this season with a foot injury.And yet, sometimes chemistry isnt all its cracked up to be. The Bengals have started the same offensive line all 11 weeks this season. But Cincinnati has given up 32 sacks -- fourth most in the league -- and is on pace for its worst rushing attack since 2010. Last week against Baltimore, four of Andy Daltons final eight passes were batted down at the line and Cincinnati fell to 3-7-1.---AP Sports Writers Michael Marot in Indianapolis, Steven Wine in Miami, Teresa Walker in Nashville, Bob Baum in Phoenix, Joe Kay in Cincinnati and David Ginsburg in Baltimore contributed to this report. Cheap Nike Huaraches Shoes . 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NEW YORK -- Top-ranked Serena Williams knew she hadnt dropped a set going into her quarterfinal showdown against Simona Halep. But that didnt stop Williams from channeling a little Goran Ivanisevic of old after her previous two US Open matches -- both romps. Williams wryly spoke about herself in the third person, claiming she was waiting for the real Serena to show up and how she dearly hoped it would be soon.On Wednesday night, Williams finally got her wish in what might have been the most scintillating womens tennis match of the year.After a torrid start in which it seemed she might run Halep right off the court, Williams needed every bit of her legendary game -- her service bombs, her defensive prowess and net play, the power ground strokes and delicate drop shots she parachuted down here and there -- to survive everything Halep started to throw at her during the 2 hours, 14 minutes they raged at each other on a muggy night at Arthur Ashe Stadium.Until this match, no previous opponent had managed to keep Williams on-court more than 68 minutes. In the end, Williams knew she had only herself to blame for the length of this match. She went 0-for-12 on break points in the second set and double-faulted to hand Halep a decisive break of her own.But it wasnt just that. The fifth-seeded Halep spectacularly took advantage of the openings Williams gave her. This was before Williams rose up just as spectacularly herself in the third set and eventually pulled away to a 6-2, 4-6, 6-3 win.I didnt play the same match in the second [set] that I did in the first, Williams said. Thats what makes me really calm. I feel like I can play so much better. I think everyone here knows I can play better.I was rather positive today -- and thats definitely not normal, but Im just going to go with it, Williams joked with a comical roll of her eyes.Though she wasnt asked about it once, the 34-year-old Williams is playing for a lot at this tournament. She has a chance to tie Chris Evert for the most US Open title wins ever, at seven. She has a chance to break a tie with Steffi Graf and get her 23rd career major win, a record for the Open era.Williams already moved by Roger Federer a match ago for the most-ever Grand Slam tournament wins (shes now at 309 ? and counting) but her hold on the No. 1 ranking for 186 consecutive weeks-- another record she shares with Graf -- is in jeopardy if she doesnt win this tournament and Angelique Kerber, whom she lost to at the Australian Open but beat in the Wimbledon final, does.Thats a lot of history in play. But its almost peculiar how little such milestones are even talked about much anymore. Williams already owns so many, its getting hard to keep track of them all. The bandwidth of her careeer has been so extraordinary for so long, its starting to feel like one of those stories in which the script gets flipped.ddddddddddddhe sum of all she has done is starting to feel greater than the parts.Halep seemed to surrender to the same idea when asked to describe how this match got away from her.She is the best player, Halep said, as if the statement hardly needed any elaboration.Halep is now 1-8 for her career against Williams but said she could at least walk away from this match knowing, This was the best I ever had against her.But Halep also knows her 105-mph serves pale next to the 120-plus bombs that Williams was smashing at her. And if she was ever going to win this match, it was going to have to happen the way it almost did: Shed have to be ready to chase down every ball Williams smashed back at her; shed have to absorb the power Williams packs into her groundstrokes and snap off some winners herself; and shed have to minimize her own mistakes and try to match Williams will and hope Williams gave her a glimmer of daylight here and there.And it nearly happened.But in the end, another difference was Halep couldnt overcome failing to convert two service break points in the first game of the third set, but Williams finally broke her a few games after that.Even an hour after the match, it was that missed opportunity that still stood out to the fifth-seeded Romanian. Said Halep: If there I could take that game, I think the story of the match wouldve been different.But she didnt. And it wasnt.Williams will now move on to play 10-seed Karolina Plishkova, the WTA Tour leader in aces, Thursday night in a semifinal that is already being hyped as having the potential to deliver the most aces ever struck in a single womens match. It will be interesting to see how Williams sore right shoulder, which has bothered her for weeks, will respond to back-to-back matches.The second-seeded Kerber and resurgent Caroline Wozniacki meet in the nights other semifinal.Williams was low-key Wednesday through much of her postmatch media conference -- even when reminded it was Plishkova who rallied to beat her sister Venus earlier in this tournament, depriving she and Serena of a chance to perhaps meet in a Slam semi for the first time in years. But Serena did seem a bit intrigued when a reporter went on to mention that Plishkova also has a sister who plays on tour -- but the Plishkovas are twins.Have you ever thought about another identical copy of you floating around, how tough that might be? Serena was asked.And the real Serena was indeed back.It would be a living hell, Williams cracked. 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