Ken Norton Jr.'s stay with the 49ers lasted about one week.
Last Monday, the 49ers hired Norton as the assistant head coach - defense/inside linebackers. But now, he's going to exercise an opt-out in his contract in order to return to the Seahawks to become the defensive coordinator.
Originally repoted by the NFL Networking and KING 5 News in Seattle, 49ers head coach Kyle Shanahan confirmed to NBC Sports Bay Area the news that was Norton was leaving.
"Last week, Ken was presented with an opportunity to once again coordinate a defense. Because of how we feel about Ken as a coach, we understand and respect his desire to pursue the position," Shanahan said.