SMU was led by Kansas transfer, Keena Mays, who had a game-high 17 points after going 4-for-8 from behind the three-point arc.
She also had five rebounds, five assists, and two steals.
Akil Simpson added 15 points and recorded a double-double after earning 11 rebounds.
Poor shooting plagued Marshall as the Herd went 19-of-64 from the field for a 29.7 shooting percentage, and 18.2 percentage in three-pointers after going 4-for-22 from behind the arc.
The Herd also had trouble at the line, going 8-for-16 from the charity stripe.
Marshall out-rebounded the Mustangs 46-41 and totaled 22 offensive rebounds, compared to the Mustang’s 14.
The 46 rebounds was the second-highest total of the season for the Herd, but Marshall could only turn the 22 offensive boards into 15 second chance points.
Marshall will return the Cam Henderson Center for a home game against UTEP on Thursday, January 14.
Bring your sweetheart and enjoy the game, a 7 p.m. tip-off in Huntington.