Three Polk State College pitchers combined in a 2-0 victory Friday over Palm Beach State College in Winter Haven.
In his first college start, Barrett held Palm Beach scoreless over five innings. He fanned five and allowed just three hits.
Vainer earned the victory in relief after pitching two scoreless innings.
Serrano pitched out of an eighth-inning, bases-loaded jam as well as the ninth to record his second save.
The Eagles host Daytona Saturday at 1 p.m.