There was a double round fixture over the weekend following the two-week Premier cricket hiatus over the Christmas period, but Gosnells couldn’t make it two wins and lost to leaders Rockingham-Mandurah on Sunday.
Without skipper Darcy Short, Luis Reece led the charge with 64 on Saturday, as Gosnells chased down the target of 202 with two balls remaining.
Rockingham-Mandurah then outclassed the Gosnells side on Sunday by 109 runs at Lark Hill.
Luke Pomersbach took two wickets and scored a run-a-ball 28 in a disappointing result for Gosnells whose finals hopes appear remote.
Gosnells host Wanneroo next Saturday in a must-win clash from 11am.