Gregg isn't alone in thinking sports as a possibility on FM. In Sunday's Patriot-News sport section, Ron Giovanniello mentioned that Cumulus would consider moving all-sports programming to FM if they had a stronger signal available in the market.
http://blog.pennlive.com/fanbox/2012/06/fan_box_radio_executive_still.html
http://blog.pennlive.com/fanbox/2012/06/fan_box_radio_executive_still.html