At the most important position, Quarterback, I decided that in a relatively weak athletic quarterback field, Vince Young is the top dog. Vick would have most assuredly been the guy had he not been incarcerated for his dog problems. He would have had the category locked up, had he not been locked up.
Running Back is an easy one to pick in Tennessee Titans stud Chris Johnson. The numbers aren't what I'm looking at here, although in his short career he has put up Hall of Fame numbers. He ran a 4.24 40, and he even had the audacity to challenge the fastest man alive, Usain Bolt, to a race. He leaves defenders in their dust, and there is no one remotely close to him athletically.
Wide Receiver was a really tough one to pick because there are so many good ones to choose from. I narrowed it down to Andre Johnson of the Texans, Calvin Johnson of the Lions, and Brandon Marshall of the Dolphins. If I were forced to pick only one I would have to choose Calvin Johnson by the slimmest of margins.
Crazy Calvin Johnson catch below. Notice how matter of fact he is after he catches it.
At Tight End it's the 49er's Vernon Davis. The guy weighs an imposing 253 pounds and ran a 4.38 40 yard dash. He is one of the few tight ends who is explosive in the open field, and is a true play maker.
Middle Linebacker is another easy one to pick. On top of being the best defensive player in the league, (better than Revis), Patrick Willis of the 49er's is an athletic anomaly. You cannot even call me a homer on this one, he is the unanimous pick at this position.
At Left Outside Linebacker I would choose Brian Orakpo from the Texans because of his youth, quickness, and extreme workout routine.
Here is a video of Orakpo being a beast.
Right Outside Linebacker is another easy one in the Cowboys DeMarcus Ware. He has been the most productive players at his position for the last five years, and he simply manhandles linemen.
Cornerback is a really hard one to pick because, like wide receivers, there are so many good ones to choose from. I chose Antonio Cromartie, now of the Jets, because of his great size and speed. His arms seem to go on forever, and he has strides like a gazelle.
At Free Safety I would love to choose Ed Reed, but he is getting up their in age, so I don't think he is currently the most athletic. However, you can't go wrong with Antoine Bethea of the Colts. Drafted in the sixth round, he has done nothing but impress on the field, and he makes my list because of his monstrous hits on unsuspecting receivers and backs.
Lastly, at Strong Safety, I would pick Troy Polamalu of the Steelers. He is a freak on run defense, and he changes the game every time he is in on a play. When he is healthy, it seems as if there are 5 of him out on the field.
Here is a sick video of Polamalu. Watch 0:22 for an unreal interception!