This article discusses the efforts of the Saint Joseph's basketball team this season. In early November all 326 Division I basketball teams were undefeated. At week's end two remained: Stanford--courtesy of last Saturday's buzzer-beating 80-77 win over Arizona--and tiny Saint Joseph's in west Philadelphia. The on-campus bracketologists almost hyperventilate when talking about the possibility of the Hawks' being a No. 1 seed in the NCAA tournament. But that could happen, and the primary reason is quiet, earnest senior guard Jameer Nelson, a brick house from nearby Chester, Pa. With as many as four perimeter players--Nelson, Delonte West, Pat Carroll and Tyrone Barley--in the game at the same time, St. Joe's pressed for the entire first half, as it always does. Against La Salle, the best backcourt in college basketball, point guard Nelson and junior shooting guard West, needed to play only 30 and 27 minutes, respectively.