Jessica Shults drove in two runs, and tied the game at 1 with a sacrifice fly in the fifth.
The Sooners (54-8) went ahead to stay later in the inning on Brianna Turang’s run-scoring grounder.
Shults tacked on an RBI single in the sixth before Katie Norris’ squeeze brought in Ricketts.
Game 2 of the best-of-three series is tonight.
The fourth-seeded Sooners had 11 hits, the
second-most allowed by Jackie Traina (40-3) this season, to win their 12th consecutive game and snap an 11-game win streak for the Crimson Tide.
Traina did manage to record six strikeouts.
She also scored Alabama’s only run on Kendall Dawson’s sacrifice fly.
Alabama’s Kaila Hunt, a former Greenbrier standout, was 0 for 4.