Willy met with the team's medical staff on Friday and will continue to be evaluated, the Bombers stated in a press release.
His status for next Friday's game against Montreal is unknown at this time.
Head coach Mike O'Shea will update Willy's status on Monday. All the team will say for now is that it is an upper body injury.
After the hit, Willy was able to get up and walk to the locker room, while his team sputtered under his absence, eventually losing 52-26. There was no penalty on the play.
Willy is the fifth quarterback in the league to be sidelined in the first two weeks of the CFL season, joining Montreal's Jonathan Crompton and Dan LeFevour, Edmonton's Mike Reilly and Saskatchewan veteran Darian Durant.