With any loss -- even in preseason -- mistakes were made. We look at the primary culprits aka Busters in the Raiders preseason matchup with the 49ers.

Mac Jones won't be taking any quarterback reps for the 49ers in practice this week or in their preseason finale against the Chargers on Saturday. 49ers head coach Kyle Shanahan told reporters at a Tuesday press conference that Jones sprained his knee in last weekend's game against the Raiders.