Sam Lam takes a look at some of the key positional battles the 49ers will be observing during tonight’s 49ers-Raiders game. The 49ers have most of their roster figured out, but there are still some important areas to be assessed.

Among others, Sam looks at the fullback/third tight end battle, the fourth and fifth wide receiver spots, the backups on the offensive and defensive line, some of their backup linebackers (inside and outside), and the secondary and punt return options on the roster.