Jay Bowie added four points and 12 rebounds for Marist (2-3).
Vanderbilt (1-3) got eight points from James Siakam. The Commodores shot just 23.0 percent (14 of 61) and finished with their lowest point total since a 33-31 loss to Mississippi State on Jan. 30, 1982.
Both teams lost in Thursday's opening round. Marist lost 87-44 to West Virginia, while Davidson beat Vanderbilt 75-62.
Price hit a 3 and Chavaughn Lewis scored on a fast-break slam during an 11-0 run to start the second half that gave Marist a 38-14 lead with 15 minutes left.
Vanderbilt didn't get its first point in the second half until Siakam's free throw with 13:54 remaining. After missing their initial eight shots, Kedren Johnson's layup 1 minute, 34 seconds later was the Commodores' first second-half basket.
Johnson, who had career-high 28 points Thursday, scored four Friday.
Rod Odom's basket got Vanderbilt within 47-30 with two minutes remaining.
Price made a 3-pointer to put Marist ahead 27-9 three minutes before intermission.
Morton hit a 3 and Lewis had a three-point play as Marist went up 8-0 with 15:21 left in the first half. T.J. Curry's long-range jumper extended the Red Foxes' advantage to 13-3 three minutes later.
Vanderbilt missed its first 10 shots. Sheldon Jeter got the Commodores' first basket, a 3-pointer six minutes into the game.
Vanderbilt, looking to replace its top six scorers from last season, made just 6 of 30 shots (20 percent) during the opening half.