If the guys were on the port side, they could have been thrown into the water as the ship rolled with the force of the collision and then sucked under as the ship continued its forward momentum. If on starboard where the impact occurred, they would have been crushed to pulp and so still onboard under the mashed metal.
Either way RIP.
The wreck of the USS Fitzgerald... Well at least the whole thing didn’t sink. Thank God for that it was not even worse.