San Francisco 49ers DE Arik Armstead’s fifth-year option was exercised Monday, April 30, according to sources.

Footballguys View: A first-round pick in 2015, Armstead has not played a full 16-game season since his rookie year. He’s only played in 14 games over the last two seasons and is transitioning to more of a run-stuffing role in 2018. We’ll see if he can hold up with this new role. The fifth-year option is guaranteed only for injury.