San Francisco 49ers head coach Kyle Shanahan walks on the sideline during the first half of an NFL football game against the Philadelphia Eagles in Santa Clara, Calif., Sunday, Oct. 4, 2020. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Nick Mullens (4) is sacked by Philadelphia Eagles defensive end Genard Avery, center, during the first half of an NFL football game in Santa Clara, Calif., Sunday, Oct. 4, 2020. At right is nose tackle Javon Hargrave (93). (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Nick Mullens (4) fumbles the ball as he runs from Philadelphia Eagles cornerback Cre'von LeBlanc, bottom, which was recovered by defensive tackle Malik Jackson (97), during the second half of an NFL football game in Santa Clara, Calif., Sunday, Oct. 4, 2020. (AP Photo/Jed Jacobsohn)