On almost every team there are guys that are just coasting. They made the team, they're not starters and they're not hungry enough to fight back to the top. They're taking up space, but it's not easy to find 125 fighters so they stay on the team.
I think Deion came in, told 20 they weren't good enough and the coasters realized it was just a matter of time before they're exposed and humiliated. They might as well transfer out while they can use Prime as cover.
Plausible.