Allen spent one year in the same role at Penn State.
Evans finished his time at Penn State with 564 yards and seven touchdowns on 30 catches.
"We have accomplished so many great things here as a family, but I believe the best is yet to come."
Despite the losses, outside hitter Will Kuhns posted 25 kills over the two matches, including a career-high 13 kills against Lewis.
Tom Allen is expected to join Clemson in a lateral move.
Lyrick Samuel might just have a neck injury by May.