Star Bombers defender Jordan Ridley has learned his injury fate, with scans revealing a high-grade quad strain and a significant stint on the sidelines.

Ridley succumbed to the injury during the final quarter of last Friday night's defeat to the Western Bulldogs at Marvel Stadium, with the results of the defender's scans surfacing on Monday, revealing the possibility that Ridley may not play again this home-and-away season.

Essendon's GM of Performance, Daniel McPherson, detailed the extent of Ridley's ailment, as well as what a return-to-play timeline could look like.

"The scan results have revealed Jordan suffered a high-grade quad strain in a kicking action on Friday night and will be sidelined for the next few weeks. It's disappointing for 'Rids', who has been one of our most consistent players this season," McPherson said in a club release on Monday.

"We'll get a more accurate sense of his potential return to play timeline in the next week or so, but at this early stage we believe he is unlikely to play before the last round of the home and away season."

The Bombers are scheduled to host the Sydney Swans this Saturday night as they fight to keep their finals hopes alive.