The Tigers (8-3) also got double-digit scoring from Justin Hamilton with 13 points, and from Storm Warren with 10. Hamilton grabbed seven rebounds and Warren added six boards off the bench as LSU registered a fifth straight win.
The Golden Eagles (10-1) fell short in their bid for their first 11-0 start since 1972-73.
Jae Crowder led Marquette with 22 points, hauling down nine boards, and Darius Johnson-Odom chipped in with 16.
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