Week 13 vs. New York Giants
The suspension of Michael Crabtree and injuries to Amari Cooper means Seth Roberts becomes a WR3-type option in Week 13. Practice reports have him getting a lot of action, moving around formations. Last season, he was also among the NFL leaders in red zone targets. The Giants have also lost Janoris Jenkins for the season, so a bad defense (25th in aFPA vs. WRs) got worse. If you are in serious need for a WR, you could do worse than Roberts.