Ole Miss (17-11, 8-7) snapped a four-game losing streak by racing to a 26-13 lead midway through the first half, after which Alabama could get no closer than six points. Summers connected on five free throws, two assists and a short jumper to highlight what proved to be the game's decisive surge. The Rebels led 43-28 at halftime.
The win kept Ole Miss in a tie for fourth place in the Southeastern Conference.
Martavious Newby had 15 points and 10 rebounds, while Marshall Henderson and Aaron Jones added 13 points and 12 points, respectively. Henderson set an SEC record at 61 consecutive games with a 3-point shot, breaking the mark on his first attempt from the field.
Shannon Hale led Alabama (11-17, 5-10) with 27 points and nine rebounds as the Crimson Tide fell to 0-13 on the road. Trevor Releford scored 16 points, 14 in the second half, and Levi Randolph added 13.
The Rebels managed to preserve their halftime lead on the strength of a 26-of-31 performance (83.9 percent) from the free-throw line, and a 42-24 rebounding advantage over Alabama.
The Crimson Tide closed within 64-58 on a Releford basket with 6:10 remaining, but the Rebels quickly answered with a 7-1 spurt that settled the issue. Alabama managed only three baskets the rest of the way.
The Crimson Tide shot 20 of 48 (41.7 percent) from the field and 21 of 28 (75 percent) from the free-throw line. Hale was 7 of 12 from the field and 10 of 11 from the line and kept Alabama within striking distance.
Ole Miss was 24 of 58 (41.4 percent) from the field, but struggled from 3-point range, hitting just 5 of 21 (23.8 percent). The Rebels more than compensated by the strong showing on the boards and from the charity stripe.