49ers’ Marcell Harris rebounds after rough start

San Francisco 49ers defensive back Marcell Harris (49) runs a tackling drill with defensive back Jimmie Ward (20) during a joint practice betwen the Houston Texans and 49ers at the Methodist Training Center on Wednesday, Aug. 15, 2018, in Houston.

less San Francisco 49ers defensive back Marcell Harris (49) runs a tackling drill with defensive back Jimmie Ward (20) during a joint practice betwen the Houston Texans and 49ers at the Methodist Training Center on

... more Photo: Brett Coomer / Staff Photographer

Strong safety Marcell Harris missed a slew of tackles and was a reason the 49ers allowed a season-high 168 rushing yards in a 43-16 loss at Seattle on Dec. 2

To be fair, it was not only…