Shenandoah (21-1) got all of its offense in its first two at-bats against Macon (13-13).
Brashears' classmate, Clint DeHaven, scored what proved to be the game-winning run one batter later when he trotted home on a passed ball.
Brashears, who finished the day 3 for 4, drove in the Hornets final run with a second inning single. This hit drove in catcher Keaton Neeb, who led off the SU second with a single through the left side.
The offense proved more than enough for starterBrian Goddard (3-0), who scattered one run on six hits and one walk in 7 2/3.
Goddard also struck out 10.
Junior Kyle Scallion retired the final four Yellow Jackets to post his third save of the spring.
Kyle Hicks (2-1) took the loss after giving up three runs (two earned) on nine hits and two walks in 6.0 innings.