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.