STATS and Elias Sports Bureau may be the heavy hitters in the stats game, but more and more, smaller companies are shagging business, too. What’s driving the boom? Rotisserie leagues, where participants use statistics to build and compare fantasy teams. Lew Fidler, of the Rotisserie League Baseball Association, says players can buy data from more than 60 companies: “There’s an enormous market out there.” Knowing that the White Sox’s Ozzie Guillen hits the highest percentage of foul balls may mean little to the average fan, but to the baseball-obsessed, the diamond’s numbers are precious.