49ers stay perfect, dominate Mayfield, Browns in 31-3 win

San Francisco 49ers running back Matt Breida (22) runs against the Cleveland Browns during the second half of an NFL football game in Santa Clara, Calif., Monday, Oct. 7, 2019. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Jimmy Garoppolo (10) passes as Cleveland Browns defensive tackle Sheldon Richardson (98) applies pressure during the second half of an NFL football game in Santa Clara, Calif., Monday, Oct. 7, 2019. (AP Photo/Tony Avelar)

Cleveland Browns quarterback Baker Mayfield (6) sits on the bench with teammates during the second half of an NFL football game against the San Francisco 49ers in Santa Clara, Calif., Monday, Oct. 7, 2019. (AP Photo/Tony Avelar)

San Francisco 49ers defensive end Nick Bosa, center, sacks and forces a fumble by Cleveland Browns quarterback Baker Mayfield (6) during the second half of an NFL football game in Santa Clara, Calif., Monday, Oct. 7, 2019. The Browns recovered the ball. (AP Photo/Tony Avelar)