Powell, who was held scoreless in a loss at Texas A&M on Wednesday, scored the first eight points for the Razorbacks (10-5, 1-1 Southeastern Conference) on Saturday and added 6 rebounds and 6 steals.
Young added 12 of his 14 points in the second half as Arkansas bounced back from a season-worst 51-point effort in an 18-point loss against the Aggies.
Sheldon Jeter had 8 points to lead the Commodores (6-8, 0-2), who matched their season low for points and narrowly avoided setting the school mark for scoring futility. Vanderbilt committed a season-worst 26 turnovers, leading to 23 points for the Razorbacks.
Mike Brey is looking at former Notre Dame players to fill two assistant jobs that have opened up with the departures of Martin Ingelsby and Anthony Solomon.
Purdue's 2016-17 prospects got a jolt Wednesday when forward Caleb Swanigan announced he will return for his sophomore season.
Clemson's Jaron Blossomgame says he is withdrawing from the NBA draft and returning to school for a final season.