Oakland Raiders first-round outside linebacker Khalil Mack has signed his fully-guaranteed $18.677 million four-year contract.

The deal includes an $11.9 million signing bonus

The deal includes guaranteed base salaries of $420,000, $510,000, $600,000 and $690,000.

It also has roster bonuses fully guaranteed for skill, injury and salary cap in 2015 ($758,955), $1.517 million (2016) and $2.276 million (2017).

Like all first-round deals, the Raiders hold a fifth-year club option for Mack.

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Aaron Wilson covers the Ravens for The Baltimore Sun