The Raiders averaged a league-worst 14.2 points per game, fielded the NFL’s most feeble run game and allowed quarterback Geno Smith to be sacked an NFL-high 55 times. Results like that get people fired. That’s exactly what happened when Raiders owners Mark Davis and Tom Brady , along with general manager John Spytek, wiped the slate clean on the coaching front by firing Pete Carroll and his entire offensive staff, and hiring the highly respected young offensive mind Klint Kubiak to replace him. That set the stage for an offseason in which the Raiders made the Ravens’ Tyler Linderbaum the highest-paid center in league history, selected Indiana quarterback Fernando Mendoza first overall in the NFL draft and reinforced the offensive line, running back and wide receiver rooms through the draft and free agency. Raiders rookie quarterback Fernando Mendoza will battle veteran Kirk Cousins for the starting job.…