Introduced from the bench shortly before the hour mark, Elliott provided the fourth strike in Rovers’ 5-2 Championship victory at home to Birmingham City.
The Liverpool attacker, who also registered 11 assists in 2020-21, sprinted onto a pass into the right channel, moved into the box and lifted a lovely finish over the goalkeeper.
Elsewhere on the Championship final day, Sepp van den Berg completed the game as Preston North End clinched a 2-1 win at Nottingham Forest.
Harry Wilson played 77 minutes of Cardiff City’s 1-1 draw with Rotherham United before being replaced by Reds teammate Sheyi Ojo.