it is hard to tell how old he is from the sidelines, but he looks like he is in his 50s, one of the younger players in the three-days-a-week drop-in league that has been in existence in varying form and number for 25 years. (There are no rules; you come, you get in, said Dave Dittman, 61, a retired fireman from Connecticut and one of the league's founding members.) As the tan, muscular guy leaves th