Mark Kelso was the usual starter at free safety for the Bills in the early nineties. I think he started most of their superbowl appearances. He used to get a lot of flack from some TV pundits for a lack of athleticism and lack of hard hitting, but in my opinion he was a sure tackler, a good cover guy and had a knack for interceptions. He actually wasn't that fast in the open field. He was a 10th round draft pick that started for about seven or eight seasions in the NFL and went to four superbowls. Not bad.