The Raiders have tons of depth on the interior. So much, in fact, that there’ll be a dogfight for roster spots this summer.

A crowded field grew again Thursday morning, when the Raiders re-signed veteran Jordan Devey to a contract. A league source confirmed that news, first reported by NFL Network.

The reserve guard, who also can play center, started four games last season before landing on injured reserve with a torn pectoral muscle.

Devey had a strong start to the year before going down for good, so there certainly was good reason for the Raiders to bring him back.

Richie Incognito and Gabe Jackson are set to start at guard, with Devey, Andre James, Denzelle Good, Lester Cotton and new signing Eric Kush battling for jobs as reserves.

Devey and James can both play center and back up Rodney Hudson.

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This will be a position to watch during the preseason, with the Raiders possibly cutting a good player or two before the regular season. Jackson’s name has been tossed about in trade rumors, though the Raiders would like to keep him and make their line as strong as possible.

Devey played three years in Kansas City and one with the 49ers and New England Patriots before joining the Silver and Black.