Tannehill model: Could Las Vegas QB Marcus Mariota be the most realistic option many are overlooking? Similar to how Ryan Tannehill found success in Tennessee, Mariota could do the same in New England. The Raiders are projected to be over the salary cap, and keeping Mariota as a backup to Derek Carr, with an $11.3 million salary-cap charge, might be a luxury they can't afford. The Raiders announced last week that No. 3 quarterback Nathan Peterman signed a one-year extension. Garoppolo, Part II:Jimmy Garoppolo would be a natural fit to return, but that would require the San Francisco 49ers be open to moving him. No guarantee there.