— Mark Stevens (@Stevo7AFL) July 2, 2020
The trio are all yet to play a senior game this season, with Treloar suffering hamstring and calf setbacks over the pre-season.
Treloar reportedly dominated last week’s practice match against the Western Bulldogs at Whitten Oval.
— Mark Stevens (@Stevo7AFL) June 26, 2020
Varcoe has not played at senior level since the club’s Round 23 clash against Essendon last year after getting dropped for the finals. The ex-Cat underwent shoulder surgery in January.
Scharenberg ruptured his ACL halfway through the 2018 season after establishing himself as a regular member of the Pies’ back six.
He has since struggled to crack back into the senior side, however, Jeremy Howe’s knee injury has opened up a spot.
Collingwoood have two forced changes for Friday night, with Howe and vice-captain Steele Sidebottom coming out of the team.
Sidebottom was handed a four-match ban for his COVID-19 breach last weekend.
The Pies meet Essendon at the MCG on Friday night at 7.50pm (AEST).