Otago Boys' High School on the attack against Southland Boys' High School. Photo by John Caswell.
Renton has been sidelined by injury for the last six weeks but he returned in style to score two second half tries.
In the other top four match Waitaki Boys' beat Kings 29-22.
In the middle four games Dunstan beat St Kevin's 13-10 and Gore beat South Otago 26-22.
In the bottom four competition John McGlashan College beat Menzies College 22-10 and Kavanagh College beat James Hargest 40-17.
