Presbyterian (3-4) led 45-19 at halftime with a 14-0 run in the first half and a 28-3 run in the second.
Downing had 18 of his points in the first half. Austin Anderson scored 10 of his 16 and William Truss 10 of his 12 before the intermission. Anderson was 4 of 5 from 3-point range and the Blue Hose were 11 of 21.
Presbyterian outrebounded Bob Jones 47-26 and held the Bruins to 14-of-54 shooting and 4-of-22 from 3-point range.
Kyle Turner had 18 points to lead Bob Jones and Marshall Riddle added 11 on 4-of-19 shooting.