Tyler Harvey added 21 points for the Eagles. Jois shot 11 for 18 from the field and had seven rebounds.
Eastern Washington led 32-30 at halftime. The Eagles went on a 27-6 run to open the second half, capped by Harvey's 3-pointer, to take a 59-36 lead with 10:36 left. They extended the lead to 73-43 with 6:47 remaining.
The Eagles shot 50 percent from the field while Texas Southern was held to 30 percent.