The Bills on Tuesday signed seventh-round draft pick Steve Johnson, as reported by Yahoo.com. Terms of the deal were not disclosed.

Defensive tackle Kyle Williams signed a three-year contract extension with the Bills on Thursday potentially worth $14.4M, as reported by the Associated Press. The two-year starter is now signed through 2012 and is guaranteed $5.2M over the next two seasons.

Offensive lineman Demetrius Bell, the first of the Bills? three seventh-round picks and estranged son of former NBA star Karl Malone, signed with Buffalo on Tuesday, according to an Associated Press report. Selected 219th overall out of Louisiana?s Northwestern State in the draft, Bell started 22 consecutive games over his final two college seasons. The Bills also announced they have released rookie fullback Mike Viti, who signed with the team as an undrafted free agent out of Army.