Well, at any rate that's 3 signings for the Utica Comets, the new AHL affiliate of the New Jersey Devils. All 3 are signed to AHL contracts and will likely start out as depth players.
I would guess Mitens starts the season in ECHL Adirondack where he will get a chance to show his stuff likely paired up with Akira Schmid to start the season. He is 23 so he better show it right off the bat because Schmid is only 21 and is signed to a 3-yr ELC. The first step in Mitens making any forward progress is to outplay Schmid.
Grasso, out of UNH (got it right), will get a chance in camp to prove he has game, but will have to get in line unless he knocks 'em dead in camp. He averaged .70 PPG in 5 years at college. Those are decent numbers, but not the kind that usually precede future impact AHL players. He is a raw, unproven rookie and he is 25 yrs-old. At his age he will have to sparkle early for any hope of even an AHL career unless those skills have been smoldering beneath the surface and suddenly burst upon the scene in the form of the rare late bloomer and he turns out to be a real serious prospect. Highly unlikely.
Tyler Irvine played 25 games in Binghamton last season and managed 1G + 3A for 4 PTs. That's AHL depth at best, but more likely should be playing in Adironadck and waiting for a callup due to a player shortage in Utica if he has shown a lot more promise in the ECHL than he did in the AHL. He is 25 so his days are numbered from the get go.