IUPUI (3-6) opened the second half on an 11-0 run to lead 46-30. But the RedHawks (4-4) came storming back with an 18-4 surge that cut the gap to 50-48 in about five minutes.
The Jaguars called time and Combs came out of the huddle to score a quick five points, pushing the lead back to seven as IUPUI never trailed in the second half.
IUPUI shot 22-for-24 at the foul line and outrebounded Miami (Ohio) 40-27.
Washington led the RedHawks with 18 points and five assists.