Michael Bradley scored 11 points and Christen Cunningham added 10 and three steals for the Bulldogs (5-8). Tyler Hood had five assists, Marcus Johnson had four, and Samford used 16 assists in scoring 24 of 54 field goal attempts.
The Warhawks led 15-8 on 3-pointer by Jamaal Samuel, but the Bulldogs used a 13-2 run to take a 21-17 lead after a layup by Roberts. Three Bulldogs hit 3s in the final 3:48 to build Samford's 32-28 halftime lead.
Nick Coppola led Lousiana-Monroe (6-5) with 15 points and Samuel had 13.