Colbert, 25, is a former seventh-round pick of the 49ers back in 2017. He was in the second year of his four-year, $2.48 million contract when the 49ers placed him on injured reserve coming out of the preseason.
San Francisco later waived Colbert with an injury settlement and he signed on to the Seahawks’ practice squad. Seattle promoted him a few weeks ago.
In 2018, Colbert appeared in seven games for the 49ers and recorded 21 tackles, no interceptions and a pass defense.