Brock Purdy and the 49ers hang on to beat the Bears 42-38 and have a shot at top NFC seed

Brock Purdy threw a 38-yard touchdown pass to Jauan Jennings with 2:15 to play, and the San Francisco 49ers forced an incomplete pass on the final play from the 2 to beat the Chicago Bears 42-38 and set up a Week 18 showdown for the top seed in the NFC