Hynoski, 26, originally signed on with the Giants as an undrafted free agent out of Pittsburgh back in 2011. He spent four years with the Giants before he was released at the start of the regular season.
Since becoming available, Hynoski has worked out for the Patriots and Jets.
In 2014, Hynoski appeared in all 16 games and was rated by Pro Football Focus as the No. 2 overall fullback last year, which included a solid rating as a run-blocker.
Igwenagu, 26, signed on with the Eagles as an undrafted free agent out of Massachusetts back in 2012. He spent over two years in Philadelphia before being claimed off of waivers by the Lions in August of last year.
However, Igwenagu was also released during roster cuts a few months ago.
He hasn’t appeared in an NFL game since the 2012 season.