A depleted Rennie will travel to Waaia with nothing to lose after it was revealed star forward Chase Strawhorn is also out indefinitely.
Strawhorn, who broke three ribs and punctured his lung in a marking contest last week against Dookie, joins a star-studded injury list at the Grasshoppers.
Playing coach and former Richmond small Craig Ednie is also out with the same injury, Cooper Bennett broke his collarbone and Nick O’Bryan is suffering from a knee injury.
‘‘We are dismantled by injuries at the moment, every club goes through it, but we have been hit hard,’’ Ednie said.
‘‘It will be tough this weekend against Waaia, they are a good side and it will be a challenge for us.’’
Although as one door closes another opens and Ednie believed it would be a great opportunity for some of his younger boys to step up in what will be a finals-like game.
‘‘The intensity will be high, it will be hot out there and some of the young guys are going to be able to witness it,’’ Ednie said.
‘‘They will have to stand up because there is a few of us who do not know how long we will be out for.’’
The Grasshoppers had lost three games on the trot before last week’s win, but Ednie believed his side had the depth to make a deep finals run.
‘‘We have brought a lot of players in and there were a lot of good players here before I came, so I am confident in the boys’ ability,’’ Ednie said.
‘‘This week will be the start of a tough run, but we have to fight and we will be okay.’’
Waaia is on a slight resurrection following its turn of form.
Mick Cleeland’s side has won three of its past four games, with the loss only by 16 points to reigning Shepparton East.
Charlie Burrows has been a revelation up forward with 28 goals for the Bombers, while last year’s leading goal-kicker Greg Meyland has slotted in nicely across half-back.
Meyland, who kicked 66 goals last season, moved to half-back following the Bombers’ third successive loss and his shift has coincided with his side’s recent return to form.
In addition, reigning Pearce medallist Matt McCarty has found fine form, claiming best-on-ground honours for the Bombers in three of the past five games.
Dookie United v Tungamah
The Bears will be roaring this week after they knocked off Shepparton East in last week's potential grand final preview.
Jeremy O'Brien's troops are in fine form, having won seven games straight, and a trip to Dookie is the next task on Saturday.
Ash Saunders, Brent Chapman and Duane Haebich have been in consistent form, but it will be no easy fat to knock off United at home.
Patrick McMullan's side has won all three games at home this season, having beaten Katamatite, Waaia and most recently Katandra.
Playing coach McMullan and Sam Bowmaker have each booted 15 goals this season, with Will Patone on 11, although it drops away pretty quick after that, with the next best having only kicked four.
Remarkably, the Bears have almost scored double the amount of points that United have this season.
Katunga v Katandra
Katunga was brought back to reality last week following their 35-point loss at home to Waaia.
Daniel Burness and Eamon Reeves will be hoping their side can bounce back when it travels to play winless Katandra.
Katandra could not convert its best chance of a maiden win last Saturday, losing to second bottom Katamatite.
The Swans had won three games on the bounce before last Saturday, with key forwards Callum Wilson and Dylan Sidebottom running amok.
The dynamic duo have kicked 50 goals between them this season, while Kats as a collective have just outscored them, mustering up 406 points.
Corey Hickford leads the way for the Kats with 15 goals, while it falls away pretty quickly with their next best, Nathan White, boasting a handful.
Shepp East v Katamatite
Shepparton East will be looking to bounce back after Tungamah ended its 28-game winning streak last round, and what better way to do it than at home?
The Eagles have not lost at Central Park since May 2015.
Dwain Vidler’s side hosts Katamatite on Saturday.
The Tigers, who have only won two games, defeated Katandra for the second time this season, but they will be up against it this round.
The Eagles, the competition’s second highest scorers with 1033 points, take on the Picola District Football League’s worst defence.
The Tigers have conceded 1111 points this season, an average 123 points against per game.
Cobey Aynsley, who played his 100th game last week, will be the Eagles’ focal point up forward again, having already kicked 25 goals.