Collins, 29, spent last season with the Detroit Lions.
He entered the NFL as an undrafted free agent out of Washington State in 2008 but did not play in a regular-season game until 2011 with the New Orleans Saints.
Over 16 games last season, Collins caught five passes for 39 yards and a touchdown and rushed for 19 yards on eight carries.
Collins could replace Tyler Clutts, who is currently a free agent.
- Josh Sanchez