Reigning champion Ken's Wildflower recorded a dominant 151-run win over Washington CC to highlight last weekend's start of the revamped Milo/Portmore Cricket Association Under-17 competition.
Romaine Francis top-scored with 76 in Ken's Wildflower's 209 all out in the match played at the Bridgeport ground.
Nicholas Harris took 3-28 for Washington CC.
In reply, the Washington team was bowled out for 58 as Francis grabbed 4-7 and George Walker captured 3-11.
In another match, Jordan Newman and Keneil Holness scored half centuries to help the host Hamilton Gardens in trouncing Portsmouth by 170 runs.
Newman (61), Holness (54) and Gifton Mullings with 31 not out led the charge as Hamilton Gardens batted first and compiled 235 in 30 overs.
Andrew Thompson and William Thomas each took two wickets for Portsmouth.
When Portsmouth batted, Newman (3-9), Nicjoy Roberts (2-1) and Mullings (2-22) combined well to have them dismissed for a paltry 65.
At the Portsmouth Sports Ground, Colours International lost to Greater Portmore by five wickets.
Ricardo McGeachy and Raymond Hall scored 45 and 43 not out, respectively, to push Greater Portmore to 178-5 in response to Colours International's 177.
This season's Portmore Under-17 cricket competition is an upgrade from the Under-15 tournament held last year.
The launch was attended by Portmore cricket president Courtney Francis, local cricket boss Lyndel Wright, former player Reggie Scarlett, CHASE Fund CEO William 'Billy' Heaven and West Indies players' union president Wavell Hinds.