Lewis, a junior righthander from Cincinnati, recorded his 150th career strikeout when he set down the game's first two batters. He finshed with nine strikeouts and one walk. He also hit one batter. For the season he has allowed nine hits and struck out 26 in 19 2/3 innings.
Ball State (4-3) got a second-inning single from junior third baseman C.J. Webb but went 15 batters before its next hit. Lewis allowed seventh-inning singles to Webb and Kyle Dygert but ended the threat and his afternoon with a strikeout and a ground ball.
Sophomore lefthander Stephen Shao pitched the final two innings and allowed Ball State's only run on an infield single by Brian Meyer with two out in the ninth. Shao allowed five hits, walked one and struck out one.
Bill Kleinschrodt's fifth-inning single broke a scoreless tie and matched the Commodores' highest-scoring inning of the season. Freshman shortstop Dominic De La Osa led off with a double and scored on the hit by Kleinschrodt, a sophomore outfielder. Aaron Garza, Alex Feinberg and Warner Jones all singled before Baxter's triple. Baxter scored the final run of the inning when the next batter, Brian Hernandez, doubled.
De La Osa, from Coral Gables, Fla., led off the sixth with his second home run of the season and was one of four Commodores with multiple hits. Baxter was 2-for-4 with two RBI, Jones was 2-for-4 with a run scored and Hernandez was 2-for-4 with one RBI.
Vanderbilt and Ball State conclude their three-game series 1 p.m. Sunday at Hawkins Field.