The San Francisco 49ers are looking to add depth to their defensive line, and they're working out three players. The San Francisco 49ers had a rough time staying healthy on defense last season, and it called for next man up throughout the year. According to Matt Barrows of The Athletic, the team is working out three edge rushers. It was already announced that the 49ers were working out Okoronkwo, who played with the Philadelphia Eagles last season. Either three of these players could be depth pieces for the 49ers, and it'll be interesting to see who they choose after the workouts.