Chasing Subiaco Floreat’s respectable 6-224, the Mariners scored the winning run from the final ball of the match to seal the narrowest of five-wicket victories.
Winning the toss and sending the home side in to bat, the Mariners found wickets hard to come by on a flat pitch,.
However, tight spells from Joel Marrion (1-39), Stefan Botha (1-19) and leg spinner Kyle Gardiner (2-39) restricted the scoring.
Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWWestern Warriors’ rookie Gardiner impressed from his 10 overs, and Brendon Diamanti also claimed two scalps to finish with 2-46 from his 10 overs.
Wicketkeeper-batsman Calum How (68) and opener Alex Malcolm (62) combined for an 86-run partnership for the second wicket, before Aaron Lilly (38) and Stefan Collins (24) made handy contributions to push Subiaco Floreat’s total to 224.
The Mariners started steadily, but lost opener Josh Smith (25 from 19 balls) and captain Craig Simmons (2) in quick succession to be 2-43, before Sutton combined with Elliott Lyons (28) and Diamanti (51 not out).
Sutton faced 147 balls and hit four boundaries on his way to 92, and with Diamanti added 116 runs for the fourth wicket.
Dane Ugle departed for three before Diamanti and Mitchell Green saw the Mariners home for the loss of five wickets.
Diamanti scored the winning run from the final ball for a morale-boosting win to the playing group and new coach Mark Atkinson ahead of facing Midland-Guilford at Lark Hill tomorrow.
Rockingham Mandurah had another win in second grade, defeating Subiaco Floreat by three wickets, while the third and fourth grade sides both lost to the Lions.