Dansby taking control It's assumed that wide receiver Brandon Marshall is the biggest offseason acquisition the Dolphins made -- a safe assumption based on his three consecutive 100-plus catch, 1,000-plus yard seasons. Marshall, though, said inside linebacker Karlos Dansby, who signed to a five-year, $43 million free-agent contract from Arizona, has had the most impact. Marshall told me that Dansby has been very ambitious in getting his teammates to buy into new defensive coordinator Mike Nolan and stressing the team-first philosophy that coach Tony Sparano insists upon. Marshall said Dansby's leadership permeates through both sides of the ball and that he's the guy players are leaning on at this point. In another interesting take, Marshall told me that Pennington might be the most respected player on offense. Although Pennington will be holding a clipboard as the backup quarterback, he is constantly helping Henne, Thigpen and White during practice. Marshall said Henne is an extension of Pennington and players can see the veteran's influence in nearly everything Henne does, which is a good thing, Marshall said.