Long before there were soccer moms, there were Little League dads. And anyone who's been around kids' baseball -- or who's seen the ''Bad News Bears'' movies -- will recognize the coaches whose philosophies clash in this endearing play by Richard Dresser (''Below the Belt''). Don (Robert Clohessy) is a jock who spits a lot and believes having fun translates to ''one word...winning.'' Dweebish Michael (Matthew Arkin) wants to give the kids a ''place of nurturing.'' The characters are simply drawn and the acting is best when they engage in snappy baseball-as-metaphor banter. The play becomes less compelling, even maudlin, when real life creeps in (woman trouble, a rebellious son). All in all, as Michael says of a ball game, ''win or lose, it's not a bad afternoon in the park.''