WR Isaiah Williams was among a trio signed by the Raiders on Thursday. (US Presswire)

The Raiders signed NT Johnny Jones (6-foot-4, 321 pounds), RB Jon Hoese and WR Isaiah Williams to reserve/future contracts Thursday, the team announced.

Jones spent most of the 2011 season on Green Bay's practice squad but was placed on the PUP list this year with a knee injury and ended up on injured reserve. The Packers waived him off IR in December.

The Miami Dolphins signed Jones, who has yet to appear in a regular-season NFL game, as an undrafted rookie out of Marshall in 2011. After Miami waived Jones, the Packers signed him to their practice squad Sept. 21, 2011.

Williams (6-2, 204) spent time on the Arizona Cardinals' practice squad in 2012. He signed with Baltimore in 2009 as an undrafted rookie out of Maryland, where he was teammates with Raiders WR Darrius Heyward-Bey. He has also spent time with the Steelers and Seahawks.

Hoese (6-2, 247) signed with Green Bay in 2011 as an undrafted rookie out of Minnesota and spent time on the Packers' practice squad that season. He was in Green Bay's training camp in 2012.

All three were signed after working out recently for the Raiders.

Follow Raiders reporter Eric Gilmore on Twitter @CBSRaiders.