The Panthers added to the Sydney Roosters' weekend from hell after Saturday night's NRL loss, with the 20-12 win coming over the Tri-colours feeder club.
Brennan is credited with developing the wealth of talent at the foot of the Blue Mountains, and is considered a candidate for the vacant Gold Coast top job.
After winning the under-20s in 2013 with the likes of Bryce Cartwright and Reagan Campbell-Gillard, he has since claimed the 2014 and now 2017 NSW Cup titles.
