Los Angeles Chargers quarterback Geno Smith (3) is sacked by San Francisco 49ers defensive end Ronald Blair III during the first half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Nick Mullens, center right, celebrates with teammates after scoring against the Los Angeles Chargers during the first half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Josie Lepe)

San Francisco 49ers coach Kyle Shanahan, left, watches from the sideline next to wide receiver Pierre Garcon during the first half of the team's NFL preseason football game against the Los Angeles Chargers in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Josie Lepe)

Los Angeles Chargers linebacker Uchenna Nwosu (58) sacks San Francisco 49ers quarterback C.J. Beathard during the first half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Josie Lepe)

Los Angeles Chargers' J.J. Jones (89) returns a punt against the San Francisco 49ers during the first half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Josie Lepe)

San Francisco 49ers defensive back Richard Sherman smiles on the sideline during the first half of the team's NFL preseason football game against the Los Angeles Chargers in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Josie Lepe)

Los Angeles Chargers coach Anthony Lynn, center, watches from the sideline during the second half of the team's NFL preseason football game against the San Francisco 49ers in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Tony Avelar)

Los Angeles Chargers quarterback Cardale Jones (7) throws a pass against the San Francisco 49ers during the first half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Tony Avelar)

San Francisco 49ers running back Jeremy McNichols, top, celebrates with offensive guard JP Flynn after scoring against the Los Angeles Chargers during the second half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Tony Avelar)

San Francisco 49ers running back Jeff Wilson (41) scores a touchdown against the Los Angeles Chargers during the second half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Tony Avelar)

Los Angeles Chargers quarterback Cardale Jones (7) throws the ball as he celebrates a touchdown by running back Terrell Watson during the first half of an NFL preseason football game against the San Francisco 49ers in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Josie Lepe)

Los Angeles Chargers quarterback Philip Rivers gestures from the sideline during the first half of the team's NFL preseason football game against the San Francisco 49ers in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Tony Avelar)

San Francisco 49ers running back Jeff Wilson (41) celebrates with teammates after scoring against the Los Angeles Chargers during the second half of an NFL preseason football game in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Jimmy Garoppolo, left, smiles on the sideline next to quarterback C.J. Beathard (3) during the first half of an NFL preseason football game against the Los Angeles Chargers in Santa Clara, Calif., Thursday, Aug. 30, 2018. (AP Photo/Josie Lepe)