San Francisco 49ers fullback Kyle Juszczyk (44) runs with the ball past Denver Broncos linebacker Shane Ray during the first half of an NFL football game Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/Josie Lepe)

San Francisco 49ers quarterback Nick Mullens throws during the first half of an NFL football game against the Denver Broncos Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/John Hefti)

Denver Broncos quarterback Case Keenum throws during the first half of an NFL football game against the San Francisco 49ers Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/Josie Lepe)

San Francisco 49ers head coach Kyle Shanahan stands on the sidelines during the first half of an NFL football game against the Denver Broncos Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/Josie Lepe)

San Francisco 49ers tight end George Kittle runs with the ball past Denver Broncos strong safety Darian Stewart (26) during the first half of an NFL football game Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/John Hefti)

Denver Broncos head coach Vance Joseph stands on the sidelines during the first half of an NFL football game against the San Francisco 49ers Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/John Hefti)

Denver Broncos running back Royce Freeman runs with the ball past San Francisco 49ers outside linebacker Elijah Lee, left, and cornerback Ahkello Witherspoon (23) during the first half of an NFL football game Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/Josie Lepe)

San Francisco 49ers tight end George Kittle runs into the end zone to score a touchdown as Denver Broncos cornerback Isaac Yiadom (41) looks on during the first half of an NFL football game Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/John Hefti)

San Francisco 49ers tight end George Kittle (85) is greeted by his teammates after scoring a touchdown during the first half of an NFL football game against the Denver Broncos Sunday, Dec. 9, 2018, in Santa Clara, Calif. At left, is wide receiver Dante Pettis (18) and at right is quarterback Nick Mullens. (AP Photo/John Hefti)

San Francisco 49ers wide receiver Dante Pettis (18) is greeted by teammates Mike McGlinchey, center, and Mike Person (68) after scoring a touchdown during the first half of an NFL football game against the Denver Broncos Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/Josie Lepe)

Denver Broncos running back Phillip Lindsay carries the ball into the end zone for a touchdown as San Francisco 49ers strong safety Antone Exum, right, looks on during the second half of an NFL football game Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/Josie Lepe)

Denver Broncos wide receiver Tim Patrick is brought down with the ball by San Francisco 49ers free safety D.J. Reed (32) and defensive end Arik Armstead, right, during the second half of an NFL football game Sunday, Dec. 9, 2018, in Santa Clara, Calif. (AP Photo/Josie Lepe)