"You got two guys on the mound, you got a lot of scouts show up to see Overton and Frazier go at it," Golloway said. "We faced him last year, and I said, ‘Oh, he's gonna be a bear at our place.' And, you know, he was other than the big inning that we got off him."
The big inning perhaps for the first time all season exhibited OU's ability to string situational hitting and plate appearances together.
It included two bunt singles and three walks.
Designated hitter Matt Oberste ripped an RBI single through the left side, while third baseman Garrett Carey's walk plated a run and made it 4-0; then, second baseman Hector Lorenzana RBI singled, and catcher Anthony Hermelyn brought home the game's sixth run on another bases loaded walk.
First baseman Kolby Carpenter and left fielder Hunter Haley's sacrifice flies capped off the scoring and give OU an 8-0 edge.
"I thought our big inning was just outstanding," Golloway said. "I mean, we laid down a drag. We laid down a push after a base knock, and then our guys have the courage to keep laying the bat down because he couldn't find the zone. He was trying to make the perfect pitch with the bases loaded. We were able to push those runs across."
Outside of all that, though, OU did have a big bomb to start it all off.
It came off the bat of Haley, who was responsible for a pair of RBI in the inning.
"I got a fastball kinda middle in and just put a good swing on it," Haley said. "Luckily it got out."
Overton cruised—he fanned seven of his 10 over the first three innings—until he was roughed up for the first time all season in the fourth.
The Waves tagged him for six runs on five hits, including an RBI single by designated hitter Brad Anderson, two-run single by second baseman Hutton Moyer and the big blow of the inning, a three-run homer from first baseman Sam Meyer.
"I was leaving pitches up and I was enabling them to hit holes, hit that one over the wall," Overton said. "But other than that, I was trying to let them hit it and get themselves out for the most part, and that's all I can do."
Despite the huge inning, OU held on and even added on to its lead later in the game.
Hermelyn picked up his second RBI of the game on a single in the seventh, and Carpenter followed up with one of his own a batter later to make it 10-6.
Pepperdine completed scoring in the ninth when left fielder Chris Amezquita raced home on a pass ball.
Overton (4-0) recorded the win despite surrendering a season-high six earned runs on six hits and four walks to go along with his season-high strikeout total.
Relievers Jacob Evans and Robert Tasin combined for three innings without an earned run, while Tasin picked up the save.
Frazier was dealt his first loss of the season for Pepperdine with his eight earned runs on eight hits and three walks. He fanned a pair.
OU now looks to take the series when the two face again at 2 p.m. CT Saturday.
"I told the guys down the line, I said, ‘Hey, Friday night is going to be important,' because we were in a tournament before," Golloway said. "And, of course, with Hofstra we had a four-game set. But this was our true first three-game set, and I told our guys, ‘This isn't a tournament setting. You're not gonna see three different.
"It's gonna be important to get after them on Friday and set the tone for the weekend. It's more like a Big 12 weekend, and Pepperdine clearly would be a worthy opponent in our conference for sure. They're a very quality ball club."
Jonathan Gray (2-0, 1.98 ERA) is expected to face Pepperdine's Corey Miller (1-1, 3.00 ERA) in the matchup.