IN SOGGY conditions that led to a muddy pileup of more than 40 runners at the 1K mark of Oregon's Portland Meadows 5K course, the Coatesville (Pa.) High boys won the Nike Team Nationals last Saturday. "We knew we could run in the mud because of our strength training," said Coatesville coach Keith Andrew, whose team edged second-place Royal High ( Simi Valley, Calif.) and 19 other schools.... Shenendehowa High's (Clifton Park, N.Y.) Steve Murdock, a Syracuse recruit and New York state champion, easily won the individual title in 16:26.9 over Albuquerque Academy's Ben Johnson, 16:37.8.... Fayetteville-Manlius High (Manlius, N.Y.) coach Bill Aris cited Pink Floyd to sum up his team's dominating 50-point win over Hilton ( N.Y.) in the girls' race. "The first two kilometers was Comfortably Numb," said Aris, who got his first national title. "The last three was Run Like Hell."... Ashley Higginson (left) of Colts Neck ( N.J.) High sprinted past defending champ Betsy Bies of Yankton (S.Dak.) High in the last mile to take the individual title.