Going into this year’s NCAA Tournament, IF Management’s director of broadcasting and marketing, Michael Sones, cut a marketing deal with Coca-Cola that involved two ESPN analysts — one, Seth Greenberg, was an IF Management client and the other, Jay Bilas, was a client of The Montag Group. Two years ago that deal — with on-air talent from two different agencies –—could not have happened. This was one of the advantages Sandy Montag, Steve Herz and Maury Gostfrand — three top talent…