For Capital's part, the Cougars failed to take advantage of opportunities beyond just the first inning.
Capital had runners on second and third with one out in the sixth, but couldn't cross the plate.
Wong got a strikeout, and, after hitting Seth Roadcap with a pitch to load the bases, struck out Brandon Thomas come out unscathed.
Wong struck out five of the game's final six batters.
"We won six of eight coming in and we've been playing better baseball," Capital Coach Robert Massey said. "We lost eight one-run games. Still, we played good defense and we pitched well, and tonight we did not."
The Cougars have seen 59 runners fail to score this season, despite being on second base with no outs or on third base with less than two outs.
Austin Hupp had the team's only RBI, while Wong limited the Cougars to four singles.
The win gives GW six victories in its last seven games.
"Pitch, hit, play defense," GW Coach Chad Campbell said. "The first inning it didn't look like we were going to play defense. After that, we did a good job, mainly because (Wong) shut it down on the mound.
"That's what we need out of him right there."
Contact Assistant Sports Editor Rich Stevens at richstev...@dailymail.com or 304-348-4837.