At Moama Recreation Reserve, Rochy scraped home with a single wicket to spare, breaking Mower hearts in the T20 fixture.
The visitor won the toss and opted to bowl first, sending Moama in.
It looked a good decision early, as Mia Arthurson and Beatrix Bray departed without score, leaving the host in an early hole at 2/4.
Captain Delaney Laffy steadied the ship in a crucial innings, while Olivia Davy hung around to give her leader some stability.
Laffy would add 19 off 18 before departing and, while there were several starts down the order, only Jordan Dalziel reached double figures as Moama concluded its 20 overs at 7/97.
Alyssa Braithwaite, Hayley Broucek and Trinity Hayler shared the wicket-taking duties, picking up two each.
Broucek also proved useful at the top of the order, making a measured 10 and providing a counterbalance to an aggressive Cadence Major in a game-defining second wicket partnership.
Meeting at 1/14, the two added 49, primarily through Major, who belted eight boundaries for 44 not out before retiring.
Broucek had retired earlier and their separation sparked a collapse from the Rochy batting order.
At one point 1/79, the middle and lower order capitulated to 8/95, forcing Broucek to be recalled, and with the scores tied, Major also returned to hit the winning single and ice the game.
Laffy matched her batting effort with the ball, taking 3/9, while Madilyn Van Poeteren and Olivia Davy took two apiece.
BLU vs Cooma
Bamawm-Lockington United put together a measured batting performance to set a target beyond Cooma.
The Lions notched 6/94, but were in a little early trouble at 1/2 after Cooma’s Sienna Brennan struck early.
Ruby Brentnall anchored the innings with 19 retired not out, and Liz Chapman matched her feat with 19 from 21.
Arielle Glatte also put in a shift, making 15.
Madisyn Cooper held up the Cooma bowling effort, taking 3/9, while Brennan, Breanna Baker and Jarrah Griffiths joined her among the wickets.
A short-handed Cooma couldn’t muster much momentum in its chase.
The visitor to Bamawm Recreation Reserve quickly found itself in a hole at 5/24, and while Sophie McDonald provided some resistance with a gritty 12 from 33, Cooma crawled to 7/46, well short of the required target.
Danieka Hucker (3-7) was the pick of the attack for the Lions, while Emma Beal, Amy Fitzgerald and Glatte also grabbed wickets.
BLU is now 1-1 after rain washed out round two and a first week bye.
The competition now moves into one-day, 35-over fixtures, with Moama travelling to Katamatite, Nathalia hosting Cooma and Echuca welcoming BLU to its temporary home of Tongala Recreation Reserve.