Through six weeks of the NFL season, the phrase ?on any given Sunday? has never been more true. It seems the only thing NFL fans can expect out of the 2010 season, is the unexpected. Here are my surprises and disappointments. Surprises Kansas City Chiefs What a difference a year makes. There is no doubt that the Kansas City Chiefs have been this season's surprise team. The main reason for the Chiefs reemergence is a nose bloodying defense. The defense is led by DE Tamba Hali, ILB Derrick Johnson, CB Brandon Flowers and S Eric Berry. Those core four players have the Chiefs defense registering 10th in the league in total defense. On offense, the ball controlling Chiefs are led by their two-headed rushing monster of Jamaal Charles and Thomas Jones. Through five games Charles has amassed 418 rushing yards and a touchdown, while Jones has chipped in with 366 yards and two touchdowns. Arian Foster, RB, Houston Texans Arian Foster dashed on the scene with 231 yards and three touchdowns on kickoff weekend and hasn't stopped running since. Through six games, Foster has tallied 635 rushing yards, 180 receiving yards and seven touchdowns. Foster's early season rushing totals have provided the Texans with offensive balance on their way to a 4-2 start. Foster's bruising running style has been the perfect compliment to the Texans high powered passing game. If Foster continues to provide Houston with balance, look for the Texans to make their first playoff appearance. Brandon Lloyd, WR, Denver Broncos One man's trash is another man's treasure. It seems the Broncos have taken Brandon Lloyd to the antiques roadshow, because they know his value now. Lloyd has tallied 34 catches for 663 receiving yards and three touchdowns. Lloyd has always had the penchant for the spectacular catch, but this season Lloyd is making the spectacular catches look routine. Lloyd's consistency has help transform him from NFL vagabond to the Denver Broncos primary target. If Lloyd continues at this torrid pace, he will be changing his Denver Bronco uniform for an AFC pro-bowl uniform. Clay Mathews, OLB/DE, Green Bay Packers Mathews has been playing like a man a on mission this season. In five games, Mathews has already recorded 21 tackles, 1 forced fumble and 8.5 sacks. On the field, Mathews is a very talented player that plays with effort and never takes a play off. Mathews has an internal motor that never stops, which enables him to show his penchant for harassing, disrupting and sacking opposing quarterbacks. The injury bug has bitten Mathews hamstring, so NFL quarterbacks have gotten a temporary reprieve form Mathews constant harassment. When Mathews returns look for him to pick up where he left off, because Mathews of combination effort and ability seems to be unblockable. Disappointments San Francisco 49ers When Mike Singletary became the head coach of the San Francisco 49ers, he proclaimed that he wanted ?winners?. It appears though Singletary is still looking. The 49ers have looked like an incompetent group that has false started and fumbled their way to a 1-5 start. The primary impetus has been the play of Alex Smith. Smith's inconsistent play and inability to make plays has been the 49ers main issue. In six years as the 49ers starting quarterback, Smith has produced next to nothing. No division titles, no playoff appearances and no big wins. The Alex Smith apologists will tell you he has had six different offensive coordinators and never had a stable offensive line. But, this season Smith entered the season with the same offensive coordinator and three 1st round picks on his offensive line. So what is the excuse now? In his six years as the 49ers quarterback, the Smith apologists have used every excuse for his lack of production and maturation. Sooner or later the 49ers will have to cut their losses and admit the selection of Smith has retarded their growth as an organization. Dallas Cowboys They say everything is bigger in Texas. So that must be why the Cowboys offensive line has been leaving truck sized holes in their pass protection. The Cowboys are a listless 1-4 team, with no signs of life. The main reason for the slow start is an incompetent offensive line. The once imperious run blocking line has been reduced to five stationary block sleds, which has forced the Cowboys to become a pass first team. The Cowboys rank 23rd in the league in rushing, which has led to an offensive imbalance and an abundance of pressure on Tony Romo. The once dominating Dallas defense, now has the resistance of a wet paper bag. The Cowboys defense isn't giving up much yardage, but they are surrendering 25 points a game. Rookie watch Sam Bradford, QB, St. Louis Rams The St. Louis Rams have already tripled their last season win total and the main reason is Sam Bradford. Bradford's quick and decisive decision making has the Rams believing they have a franchise quarterback. Bradford's 1,357 yards passing and seven touchdowns aren't eye popping, but Bradford's presence and leadership shouldn't go unnoticed. If Bradford continues to mature, the St. Louis Rams will have a solid foundation to build upon. Jahvid Best, RB, Detroit Lions It's only taken six weeks for Jahvid Best to become one of the most explosive players in the NFL. Best has racked up 257 yards rushing and 285 yards receiving. Best's explosive play making ability was on display in week two, when he rushed for 78 yards and caught nine balls for another 154 for a total of 229 yards and three touchdowns. If Best can stay healthy and continue his production, he has to be one of the early favorites for offensive rookie of the year. Mike Williams, WR, Tampa Bay In five months Mike Williams has gone from 4th round pick to the Buccaneers number one receiver. In five games Williams has snagged 23 receptions for 283 yards and three touchdowns. Williams is an athletic receiver that has a penchant for the spectacular catch. The Buccaneers QB Josh Freeman and Williams have connected early and often and are one reason the Buccaneers are off to a surprising start. Earl Thomas, S, Seattle Seahawks Earl Thomas has been everywhere for the Seattle Seahawks. In his first five NFL games Thomas racked up 27 tackles and 3 interceptions. Thomas' speed and ability to diagnose plays has aided his smooth transition to the professional game. Thomas' ball-hawking ability has improved a Seattle defense, which has helped the Seahawks get off to a 3-2 start.