Three weeks into the NFL season and were down to five undefeated teams.The Patriots, Ravens, Eagles, Vikings and defending champion?Broncos enter Week 4 as the only teams with unblemished records.So, we ask:This years unbeaten crew is surprising, as four of the five are employing different starting quarterbacks from a year ago, while the Ravens Joe Flacco is back after tearing his ACL.As one might expect, all five hold prime spots in this weeks ESPN Power Rankings. With second-year QB Trevor Siemian at the helm, the Broncos have reclaimed the top spot, boasting wins over two playoff teams and Andrew Lucks Colts.The Tom Brady-less Patriots have been besieged by injuries but hold down the No. 2 spot, with Brady set to return in Week 5. The Vikings lost Teddy Bridgewater and Adrian Peterson to injuries, but Sam Bradfords addition, combined with a suffocating defense, has vaulted them to No. 4. The Eagles have ridden the hot hand of rookie QB Carson Wentz to No. 7, and the Ravens round out the top 10 at No. 10.Last year the Panthers made it to 14 wins before their first loss. Well see if any of these five can take it that far. Cory Littleton Rams Jersey . Andrew Luck lost his favourite target and the Indianapolis locker room lost one of its most revered leaders when Reggie Wayne was diagnosed Monday with a torn anterior cruciate ligament in his right knee that will cost him the rest of the season. Jared Goff Youth Jersey . LeBron James and Chris Bosh didnt need any more. Williams scored 11 points in 10 minutes, Alan Anderson scored 17 points, and the Brooklyn Nets finished the exhibition season with a 108-87 win over the Miami Heat on Friday night. http://www.laramsfootballshops.com/gerald-everett-jersey/ .ca NBA Power Rankings, ahead of the Miami Heat and San Antonio Spurs. Deacon Jones Jersey . -- Timbers coach Caleb Porter didnt stray from his business-like approach to the season even after Portland downed the two-time defending league champion Los Angeles Galaxy to gain crucial playoff position. Jack Youngblood Womens Jersey . MORITZ, Switzerland -- Fog prevented downhill racers from getting their Olympic dress rehearsal. SAN DIEGO -- Theyre still the San Diego Chargers, at least for four more home games.Beyond that, the Chargers are uncertain about their future home. At least its not as hyper-hot as last year, when ownership was working with the rival Oakland Raiders on a plan for a stadium in the Los Angeles suburb of Carson. That plan was rejected by NFL owners, who nonetheless gave the Chargers the option to join the Rams in a stadium in Inglewood scheduled to open in 2019.The Chargers then spent most of this year campaigning for a measure that would raise $1.15 billion for a $1.8 billion stadium and convention center annex in downtown San Diego that would replace aging Qualcomm Stadium. All the while, they reminded everyone that they hold the option to move to L.A.Voters called their bluff, voting it down 57-43. It needed 66.7 percent to pass.Chargers chairman Dean Spanos said hell consider his options but wont announce a decision until after the season.Interestingly enough, their first game since Election Day is at home against the Miami Dolphins. The Chargers beat the Dolphins on Dec. 20 on an emotional day in which fans thought they were seeing their beloved Bolts in San Diego for the final time.Quarterback Philip Rivers said hes optimistic enough groundwork has been laid for the team and city to eventually agree to a stadium deal.The love from team to the city and the city to the team has been awesome over the last 55 years and the last 13 Ive been here, Rivers said. I cant see us not here. We have four of our last seven at home and a chance to bounce back and get back in the thick of it, and hopefully we can have some exciting home-field advantage type of atmosphere games down the stretch.Here are some things to look for when the Chargers (4-5) host the Dolphins (4-4):MOO: Being from Wisconsin, Chargers second-year running back Melvin Gordon is OK with coach Mike McCoy referring to him as a bell cow after he went off for a career-high 196 yards on 32 carries and his NFL-leading 11th touchdown in a home victory against Tennessee. He also caught four passes for 65 yards.I mean, its cool, Gordon said. Its all right. I like it, I guess. You hear it a lot at Wisconsin, going there.Gordon is running hard and quickly making people forget his miserable rookie season. Hes run for 768 yards and nine touchdowns, with two receiving TDs.Gordon became the bell cow after Danny Woodhead was lost to a knee injury in the second game.Mores been put on his shoulders. Hes played more snaps and had a lot more carries, Rivers said. You dont want to run himm down, but at the same time the way hes going, you want to give it to him as much as he can.dddddddddddd I dont think its a deal where hes going to get it handed to him 30 times, but were going to need him to keep running the way hes running, because when were able to be that balanced and have those type of drives, it makes us that much better.ANOTHER RUNNER: Miamis Jay Ajayi has rushed for 100-plus yards in three consecutive games, including two straight 200-yard games The last Dolphins running back who had three or more consecutive games with 100-plus yards was Reggie Bush, who had four straight in 2011.Ajayis 529 yards in those three games are third most in team history behind Ricky Williams, who rushed for 587 and 545 yards in two three-game stretches in 2002.OPENING HOLES: Dolphins center Mike Pouncey reached the second level to block a linebacker and seal off a lane for a 20-yard touchdown run by Ajayi. Thats just one small example of the job the offensive line has done to pave the way for the Dolphins recent turnaround.Youve got four guys who can play left tackle, and youve got probably the best center in football, in my eyes, Branden Albert said. Our talent and our experience is helping us out.Albert is the starting left tackle, but left guard Laremy Tunsil, right guard Jermon Bushrod and right tackle JaWuan James all have experience at left tackle.DEEP IN RETURNERS: Darren Rizzi is in his eighth year as the Dolphins special teams coordinator, and hes never enjoyed so much depth among his returners.Rookie Kenyan Drake ran back a kickoff 96 yards for the winning touchdown last Sunday against the Jets. Jakeem Grant scored on a 74-yard punt return in Week 5. Jarvis Landry is averaging 11.1 yards on punt returns.Its a good problem to have, Rizzi said. For a special teams coach to have options back there where youre not just a one-trick pony, it really helps you. This is the first time in eight years weve had this many guys Id feel comfortable putting back there.GATES WATCH: San Diego star Antonio Gates is three touchdown catches shy of matching Tony Gonzalezs NFL record for a tight end (111). Gates has caught 81 touchdown passes from Rivers, an NFL record for a quarterback-tight end combo.---AP Sports Writer Steven Wine in Miami contributed.---For more NFL coverage: http://www.pro32.ap.org and http://www.twitter.com/AP-NFL---Follow Bernie Wilson on Twitter at http://twitter.com/berniewilson ' ' '