Martin Seiferth added 13 points and eight rebounds for the Eagles (4-11, 2/3 Big Sky), and Thomas Reuter had seven assists. Eastern Washington committed 19 turnovers and shot just 8 of 20 from the free-throw line, but overcame that by hitting 8 of 17 3-pointers and shooting 50 percent overall from the field.
DeWayne Russell led Northern Arizona (5-10, 2-3) with 17 points, and Michael Dunn had 11.
The Lumberjacks scored the first seven points of the game before the Eagles rallied and took the lead at 16-15 on a jumper by Jois. Chiverton later added two 3-pointers and three free throws during a 16-1 run that put Eastern Washington ahead 32-18 with 4:18 left in the first half.
The Eagles' lead reached as many as 25 points in the second half.
ESPN's Dan Dakich joins The Paul Finebaum Show to discuss the SEC's presence in the NBA Draft.
Ted Kapita was the top-rated recruit from West Virginia in the class of 2015 and recently played at DME Academy in Florida.
With the Suns drafting Tyler Ulis, they now have five guards on their roster who attended Kentucky.