Wilson and Ellison were restricted free agents who received contract tenders from the team earlier this month. Wilson started 12 games and had a career-best four interceptions last season, and Ellison started eight games before sustaining a season-ending quadriceps injury.
The Bills re-signed three exclusive-rights free agents -- linebacker Jon Corto, defensive back Cary Harris and Jonathan Stupar.
Free-agent wide receiver Felton Huggins, who spent last season on Buffalo's practice squad, also was re-signed.
Copyright 2010 by The Associated Press