Terps right-hander Zach Thompson allowed four runs over four innings.
Austin Chavis, Ben Cowles and Bobby Zmarzlak, among others, stepped up against Bryant.
While Dean issued five walks, he kept the Bulldogs off the board while on the mound.
Alleyne tied a program record with six hits while Zmarzlak hit two homers.
Sean Fisher went 6 ⅓ innings, striking out four and walking one.