Pleffner followed with an RBI single to left and Wander Ramos blasted a double off the wall in center to complete the rally and chase Creasy from the game.
Kylin Turnbull got the start and put up five quality innings, allowing two runs on six hits while walking one and striking out three. Ronald Pena came on to earn the win with four innings of relief, allowing just one hit while shutting off the Power.
Like so many times this season, the Suns struck first with a run in the first inning.
Ballou reached on an infield single off third baseman Eric Wood's glove and Renda slapped a single to right to start the game against West Virginia starter Luis Heredia. After Pleffner hit into a fielder's choice, Wander Ramos looped a one-out single to right to score Ballou.
But it didn't stop the Power, which came back with two runs in the second off Turnbull.
Wood led off with a single to center and took third on Raul Fortunato's double down the right-field line. Jonathan Schwind singled to left to score Wood to tie the game. Fortunato scored on Chris Diaz's one-out grounder to short to give West Virginia a 2-1 lead.
Hagerstown rolled the dice with aggressive base running to tie the game in the second. Pedro Severino reached on an infield single to third. With one out, Ballou lined a shot over Walker Gourley's head. Keister waved Severino around third, but he was thrown out at the plate on a relay as he tried to barrel over Power catcher Kawika Emsley-Pai.
Ballou took third on the throw and scored when Renda grounded a single along the first-base line to tie the game at 2.
The Suns climbed back ahead using station-to-station play in the fourth. Stephen Perez and Ballou singled to open the inning and end the night for Heredia. Creasy came on and got Renda to hit into a broken-bat double play, moving Perez to third. Pleffner cashed in by lining a single to center to give the Suns a 3-2 lead.
Renda finished with three hits, while Pleffner and Ramos had two each as the top four hitters in the Suns' batting order went 11 for 19 with six RBIs.