Symes, 23, accepted a ride on the back of a vehicle last Friday instead of walking the distance from Max Basheer Reserve to the club’s temporary change rooms on the Western side of AAMI Stadium.
Symes slipped from the vehicle when it went over a speed hump at low speed and fractured the thumb on his left hand and also the scaphoid bone in his right.
The ex-Port Adelaide defender, who played 16 games in his first year with the Crows, has both hands in plaster and is expected to miss the majority of the NAB Cup campaign, and could be in doubt for the opening round of the home and away season.
Crows operations manager John Reid said if Symes had his time over he would not put himself in that position again.
"He's disappointed because he'd been training well, he's been one of our best performers," Reid said.
"That's eight weeks where he could have been playing and will now miss all the ballwork."
