49ers lose backup OL Shon Coleman to serious leg injury
San Francisco 49ers offensive tackle Shon Coleman, center left, is helped onto a cart during the first half of the team's NFL preseason football game against the Dallas Cowboys in Santa Clara, Calif., Saturday, Aug. 10, 2019. (AP Photo/Josie Lepe)

San Francisco 49ers offensive tackle Shon Coleman, center left, is helped onto a cart during the first half of the team's NFL preseason football game against the Dallas Cowboys in Santa Clara, Calif., Saturday, Aug. 10, 2019. (AP Photo/Josie Lepe)

Aug. 10, 2019 09:57 PM EDT
Dallas Cowboys defensive end Taco Charlton (97) rushes against San Francisco 49ers offensive tackle Shon Coleman (78) during a 2019 NFL week 1 preseason game, Saturday, August 10, 2019 in Santa Clara, Calif. The 49ers defeated the Cowboys, 17-9. (James D. Smith via AP)

Dallas Cowboys defensive end Taco Charlton (97) rushes against San Francisco 49ers offensive tackle Shon Coleman (78) during a 2019 NFL week 1 preseason game, Saturday, August 10, 2019 in Santa Clara, Calif. The 49ers defeated the Cowboys, 17-9. (James D. Smith via AP)

Aug. 11, 2019 08:33 AM EDT