Freshman Jack Wynkoop pitched seven scoreless innings as South Carolina defeated LSU 4-0 on Sunday afternoon at Alex Box Stadium, handing the Tigers their first series loss of the season.

The 10th-ranked Gamecocks, who won 4-2 on Saturday, improved to 33-12 and 13-8 in the SEC. Second-ranked LSU fell to 39-6 and 16-5 after losing consecutive games for the first time this season.

Wynkoop (6-2) limited the Tigers to five hits. He had no walks and one strikeout. Adam Westmoreland relieved to start the eighth and gave up a one-out single to Mark Laird and a two-out walk to Jared Foster before Tyler Webb relieved and got Alex Bregman to fly out.

Webb pitched a perfect ninth to get his SEC-leading 14th save and second in as many games.

LSU, which had swept three SEC series and won three others, scored just two runs in the final two games after winning the series opener 5-2 on Friday night.

The Tigers squandered several scoring opportunities in the loss Saturday, but Wynkoop limited their opportunities Sunday.

Jared Foster got a one-out single in the first, but Wynkoop got Bregman to fly out and Mason Katz to hit into a double play.

Raph Rhymes led off the second with a single, but Christian Ibarra followed with double-play grounder and Ty Ross popped up.

Sean McMullen doubled with two out in the third, but Foster fouled to first.

After Wynkoop had his first 1-2-3 inning in the fourth, JaCoby Jones singled with two out in the fifth before pinch hitter Chris Chinea popped out.

The Tigers went out in order in the sixth before Katz led off the seventh with a double. Wynkoop then got Rhymes, Ibarra and Ross in order.

LSU starter Kurt McCune (3-1), who had pitched seven scoreless innings over his last four appearances, struggled from the outset in his first start against a Southeastern Conference opponent as South Carolina took a 2-0 lead in the first inning for the second consecutive game. With one out Chase Vergason hit a liner to right that Foster dove for and missed. The ball rolled past him for a triple.

One out later LB Dantzler doubled home Vergason and Max Schrock singled home Dantzler.

The Gamecocks loaded the bases when Grayson Greiner singled and TJ Costen walked, but Ibarra made a diving stop of Connor Bright’s grounder to third and threw him out to end the inning.

South Carolina added a run in the second when Tanner English walked leading off, Graham Saiko singled him to third and Vergason hit a sacrifice fly.

McCune gave up six hits and three runs in 2.2 innings. Nate Fury relieved with a runner on second and got the final out in the third.

Brent Bonvillain relieved to start the fourth and pitched four scoreless innings, allowing just one hit and one walk.

Nick Rumbelow pitched a scoreless eighth and Joey Bourgeois relieved to start the ninth. Patrick Sullivan walked leading off and English reached when Katz misplayed his sacrifice bunt to first for an error.

Saiko advanced both runners with a sacrifice bunt and Vergason hit a sacrifice fly off Chris Cotton for an unearnd run that made it 4-0.