Atogwe was let go by the St. Louis Rams. The reason he was released has to do with the $8 million roster bonus that was set to come his way on Feb. 21. St. Louis didn't want to pay the bonus, so they decided to simply cut ties with Atogwe.
Last summer, the Lions were reportedly interested in Atogwe when he was a free agent, but his salary demands were too high for the interest to go anywhere. It's unclear if the Lions would be interested in him this time around now that Erik Coleman was just signed, but if the price is right, I certainly would like to see Atogwe in a Lions uniform.
The other two safeties, Sanders and Wilson, were released by the Indianapolis Colts and Houston Texans, respectively. Sanders can be a very good player when healthy, but the problem is he rarely is healthy. I'm sure he will land somewhere, but considering his injury problems, many teams probably won't even consider him. As for Wilson, he was a member of an absolutely dreadful Texans secondary last season, so I don't believe the Lions would be all that interested in him.