LSU improved to 9-6 on the year with its second straight win, while Centenary fell to 8-11 with the loss.
Forrest, a true freshman right-hander from Haughton, La., worked the first three innings of Tuesday's contest, allowing just one hit with one walk and four strikeouts.
"I thought T.J. Forrest was excellent and showed a lot of poise in his first college outing," said LSU coach Paul Mainieri. "Louis Coleman was dominant tonight and pitched extremely well in the closer role. I thought we also played very good defense and made some key plays to support our pitching."
Coleman blanked the Gents over the final 2.2 innings to earn his first career save. The sophomore right-hander allowed no hits and recorded five strikeouts.
LSU played effective defense throughout the game, as the Tigers turned two double plays and threw out a Centenary runner at home on an attempted double steal.
LSU grabbed a 1-0 lead in the first when Jared Mitchell walked, stole second base and scored on a throwing error by Noland.
The Tigers increased the advantage to 2-0 in the second inning when Jordan Mayer walked, stole second base, advanced to third on wild pitch and scored on J.T. Wise's infield single.
Centenary narrowed the gap to 2-1 in the fourth when Cameron Penney scored on a double-play grounder by Alex Maldonado.
LSU returns home this weekend to play host to Southern Mississippi in a three-game series in Alex Box Stadium.
Tigers nip Centenary 2-1
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