Personal Info:
Real Name: Nelson Frank
Also Known As: No known Alias
Place Of Birth: Unknown
First Appearance: Deadpool Vol.1 #46 (2000) Modern Age Villain
Known Associates: No known Associates
Group Affiliation: None
Base Of Operations: Brooklyn, New York City
Grudges: Deadpool
Creators: Jimmy Palmiotti and Paul Chadwick
Bag: Sack possesses a bag of unknown origin that contains a portal to another dimension populated by small, flesh eating creatures. Sack wears a pair of titanium gloves in order to handle them.
Nelson Frank was cleaning up after a game at Shea Stadium when he found a nondescript sack in a men's room stall next to a pair of titanium gloves and the skeleton of a horned being. Nelson disposed of the skeleton and took the sack and the gloves to his Brooklyn home. When his mother knocked over the sack creatures from another dimension escaped a portal within the sack and devoured her before Nelson figured out to put the gloves on and shove the creatures back into the sack. He subsequently used the creatures to get rid of a nosey neighbour, a nasty pizza deliveryman, a group of Girl Scouts and a couple of co-workers. Realizing that he could actually profit from the creatures he sought to rob the Brooklyn First Federal Savings and Loan bank as the Sack.
Sack at Marvel Universe: The Appendix