I think the thread title captures it. My impression of Edelman today was that he is a football player. He made a few plays that were very heads up, and frankly plays that would normally be expected of career defensive players. That goalline play against Young was very impressive. Not only did he completely mug his guy, he quickly recognized Young's intent to run, utilized the receiver to cut quickly and was immediately broken down. That was very impressive.
I also noticed a few other things watching Edelman today. Despite being a slot receiver/punt returner I thought that his hips were a little less fluid than you would like to see from a corner. He plants well, cuts well, but in his ability to backpedal, pivot to side step, then break into sprint he seems limited. I think that he is excellent at playing physically and was fantastic at defeating quite a few get off the jam moves. He stuffed one attempted swim like a lineman...he locked his hand into the guy's armpit, misdirected him, and took him out of the play. Pretty football. He timed his blitz surprisingly well too.
I'm beginning to think that the best fit for Edelman is on defense, and not necessarily at slot corner. I think that given the opportunity to get snaps on defense he will get a feel for watching offenses progress from the other side of the ball. He accelerates well, has good ball skills, seems to be a natural tackler, and has the makeup to be OK at blitzing. He was also a QB which from a read standpoint is essentially the mirror of a major position of need. I think that experience could be beneficial to a future at free safety. I'm going out on a limb here, but my feel as been right more than wrong with this stuff and I'm going to trust it. I think that there is a very good chance that Edelman can develop into an NFL starting caliber free safety and very well could play that spot next season. Flame away.