Gauging a player's fantasy worth off of preseason performance can be a double-edged sword for fantasy owners. For every head-turning performance turned in by a Ben Tate, as in the 2011 preseason, there is a Cedric Peerman or Anthony Dixon, circa 2010, who put up three and four touchdowns, respectively. Then the regular season rolls around and neither is a factor for fantasy purposes, rendering their preseason feats useless for evaluation purposes. The same perilous situation affects the defensive side of the ball as starters are rested and kept to very limited action, allowing names to jump off the stat sheets who are not normally thought of as fantasy relevant. A better example would be a look at the top two running backs this preseason, Cyrus Gray (Kansas City) and Joique Bell (Detroit). Do we really expect to see either of these players among the Top 50 fantasy producing players at their position? Didn't think so. So, let's delve into the defensive side of the ball and examine some preseason darlings to date and their chances to actually contribute once the ‘real' season begins. Jordan Senn, OLB, Carolina: After being allowed to check out his worth on the free agent market, Senn re-signed with the Panthers as mainly a special teams player. He leads the NFL this preseason with 17 total tackles and actually has had some moderate success when called upon for extended playing time. He amassed more than 70 total stops last season and forced three fumbles while filling in on an injury ravaged Carolina linebacking corps. As the kickoff of the 2012 season nears, the Panthers are once again nursing some nicks and bruises among their linebackers. Jon Beason has yet to suit up for a preseason contest while recovering from an Achilles injury and oft-injured Thomas Davis is dealing with a calf problem. Davis is also attempting to comeback from three ACL surgeries and is far from a lock to make it through the season unscathed. Senn is undersized at 5-foot-11 and 225 pounds but is the primary backup to both Beason and Davis, so he could hear his name called again to step in and contribute for Carolina in 2012. His preseason success is less of a ‘red herring' and more of a reminder to fantasy owners that he can get the job done if given the opportunity. Stewart Bradley, ILB, Arizona: Bradley was a huge disappointment last year, his first in Arizona, as he failed to unseat Paris Lenon in the Cardinals defense and put up only 31 total tackles. Entering his second ...