By ERIC OLSEN, the Associated Press
Five of the top eight seeds were unbeaten through two days of an NCAA baseball tournament marked by potent offenses and few surprises until Arkansas staged a dramatic comeback against No. 7 Oklahoma State. No. 1 Tennessee, No. 4 Virginia Tech, No. 5 Texas A&M and No. 8 East Carolina advanced to regional finals. Arkansas was down 10-5 in before exploding for 15 runs over the final three innings and beating the Cowboys 20-12. Five teams scored at least 20 runs Saturday, and one or both teams scored in double digits in 14 of the 30 games.