Kentucky (18-10, 4-5 SEC) also claimed a 5-4 win on Friday in the opener en route to its first series victory at LSU since 2007. The Cats entered the weekend owning just seven wins at Baton Rouge in program history.
UK pounded out 19 hits in the extra-inning affair, including four by freshman first baseman Evan White and three by sophomore outfielder Marcus Carson, the latter who also stole a pair of bases. They also got the first career home run from junior Dorian Hairston as part of a two-hit day. Ka'ai Tom added two hits and his ninth and 10th stolen bases of the season.
Spencer Jack (1-0) picked up the win out of the UK bullpen, working the final 3.2 innings. He allowed just one hit, two walks and struck out three.
LSU (23-5, 5-4 SEC) started Jake Godfrey, who entered the game undefeated, but the Cats chased him after plating four runs on six hits and a walk through the first two innings. Reliever Parker Bugg (0-1) took the loss, allowing three runs on five hits in his 2.2 innings of work.
UK's series-opening win on Friday was highlighted by a strong start from Zack Brown, who allowed only two earned runs over 6.2 innings against the potent Tiger lineup, and a three-hit game from Thomas Bernal. Tom drove in the game-winning runs with a 12th-inning double.
Zach Strecker (2-0) earned the win, allowing just one run over three innings over work, while Jack picked up his fourth save of the season with a perfect close.
The Cats return to action Tuesday at home against No. 24 Indiana. Game time is slated for 4 p.m. ET at Cliff Hagan Stadium.