BLACKROCK COLLEGE 28 TERENURE COLLEGE 3, Stradbrook
Scorers: Blackrock College: Tries: Shane Byrne, Shane Monahan, David Rowan 3; Pen: Darragh Fitzpatrick
Terenure College: Pen: David McAllister
Team captain Shane Byrne and wingers Shane Monahan and David Rowan (3) all crossed the whitewash in a one-sided derby match at Stradbrook.
Hooker Byrne, providing the inspiration for his young team-mates, started the scoring with a pushover try.
Darragh Fitzpatrick, one of the league's form out-halves, flicked a penalty through the posts for 8-0 and 'Rock were beginning to motor.
Terenure, who were edged out 19-16 by Clontarf seven days ago, struggled to cope with the power and pace of the Blackrock backs.
He charged over from just outside the visitors' 22 for a well-worked second try for the home side.
'Rock suffered a blow when they lost first choice full-back Niall Morris to an injury, but his fellow underage international David Madigan was an able replacement.
Losing flanker Jayden Hill to a yellow card did curtail Blackrock's attacks coming up to half-time.
But although David McAllister booted a penalty for 'Nure, Rowan nipped over for his first try to hand 'Rock an 18-3 half-time advantage.
Rowan put his stamp on the game in the second half as he notched another try, close to the hour mark, and got on to a long cut-out pass to complete the rout with his third try.