A second half try by Jamie Robinson and five points from the boot of Iestyn Harris were not enough to save the Blues as they went down 31-10 to Munster at Musgrave Park in Cork.
To complete the Blues' woes Tom Shanklin was yellow-carded in a first half when they felt the full force of referee Iain Ramage's whistle and, after the break, replacement hooker Andrew Lewis was carried off with what appeared to be a leg injury.
The Welsh stage of the Premiership Rugby 7s Series explodes into life at BT Sport Cardiff Arms Park this Saturday - and fans attending a night of thrilling regional rugby will also be showing their support for the #StayStrongForOws campaign.
In its sixth year the Blues Cup once again showed to be huge hit throughout the region and is a great advert for the community game as each of the six finalists across the three age groups produced rugby of an outstanding level resulting in 14 tries.
Inspired Cardiff Blues enjoyed Judgement Day at the Millennium Stadium as they secured a tense 17-13 win over regional rivals Scarlets in a feisty and enthralling encounter in the RaboDirect PRO12 on Easter Sunday.