Since 2015, DeShone Kizer has the worst passer rating by a quarterback when throwing 400+ pass attempts, with a 58.9 rating.

lowest passer rating by a quarterback with at least 400+ attempts since 2015; maximum 94 passer rating
Interpreted as:
lowest passer rating by a quarterback with at least 400+ passing attempts since 2015; maximum 94 passer rating

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