Justin Fields' thumb injury casts doubt on Bears' future at QB

Fields dislocated his thumb during the Bears' 19-13 loss to the Vikings.
X-rays were negative but Fields is doubtful to play this week.
Backup QB Tyson Bagent struggled in relief of Fields against the Vikings.
Fields had shown improvement but still hasconsistency issues in his third Bears season.
With a 1-5 record, speculation grows about Bears drafting a new QB in 2024.