Field Yates of ESPN reports that the 49ers brought in free agent LBs Sean Spence and Donald Butler for workouts with rookie LB Reuben Foster dealing with an ankle injury.
Spence, 27, is a former third-round pick of the Steelers back in 2012. He, unfortunately, sustained a serious knee injury early on his NFL career that wound up preventing him from appearing in a game until the 2014 season.
However, Spence was able to return and play pretty well for the Steelers before he departed and signed a one-year, $2.