Royer made 7 of 8 3-point attempts and Eversley was 3 for 3 as the Mustangs (14-12, 9-6 Big West) converted 12 of 15 shots beyond the arc and shot 58 percent overall.
Jamal Johnson added nine assists for Cal Poly, which swept the season series from the Matadors.
The Mustangs scored 12 straight points to take a 23-9 lead and closed the first half with an 8-0 run to go ahead 38-22. The lead reached as many as 21 points in the second half when Eversley hit a 3-pointer with 13:12 remaining to make it 57-36.
Maryland point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.
Louisville's Chinanu Onuaku, who recently underwent a medical procedure to correct a heart rhythm issue detected during the combine, will keep his name in the NBA draft pool.
Andrew White III will return to the Nebraska men's basketball team next season after removing his name from the NBA draft.