It is absolutely common practice. Big corners that come out usually face the same decision they have to make when making the jump to pro football, similar to small DE's that would have to switch to LB. And I'm not sure if you've followed Flowers or not. He's a natural zone cover corner, he brings all the intangibles needed to be a very good centerfielder. When he came out scouts actually viewed him as a CB/S tweener, some scouting reports (NFL.com) even had him listed as a safety prospect. By the way, for every Freeney there are about 50 John Abraham's, Robert Mathises. Even Freeney who has struggled at first is now effective rushing the QB as an OLB despite the fact that he's getting up there in age. He already showed signs of slowing down a few years ago when he played DE so this isn't really position related, more about him just being close to being finished. He probably has only 1-2 more good seasons left. Besides, when a DE gets up there in age it's usually a bad idea to move him to LB because athletically it's a lot more demanding unless all you do is rush the QB. That's why you don't see many 30+ year old guys switch from DE to LB. With corners it's a lot different, the older they get the more it makes sense to move over to free safety because athletically it's a lot easier on your body than playing corner. As a corner it's more about being explosive, having quick twitch muscles. At 30-35 years of age you lose those. However your experience goes up, your instincts improve, your ability to read QB's, the game slows down. So moving to safety is absolutely natural. You see this with every good corner that hits a certain age now, guys in their early / mid 30s. Right now that applies to Charles Tillman, Champ Bailey, Brandon Browner and a bunch of other guys. Revis in about 3-4 years potentially. It only makes sense for certain guys because it's natural for them. For others it's not. So saying switching from corner to safety is easy/hard doesn't make sense. For somebody who has those skills/intangibles, like a Tillman, a Bailey, a Woodson, McCourty, it's not a big deal, it's the easiest thing in the world. Webb is even being considered by some of the people here to play FS for us. I think he could be a good FS as well. But Jimmy Smith? Totally different story, I don't think he'd make a good safety. So it all depends on the player, not the switch itself. That being said, I only threw it out there with Flowers because I liked the idea, I think he could be a very good centerfielder. But obviously he's still too young to make that switch, he's not gonna do it. And he's not stupid, he realizes that he can make a lot more money playing corner. Wait another 3-5 years, I'm sure he'll have to switch to safety at that point if he wants to stick around in the NFL and have an impact and continue to start. Right now he's not gonna consider that move for obvious reasons.