An update on the official Steelers site shows that Bell has been taken off of the roster completely. This comes after Pittsburgh dumped Bell from the depth chart ahead of last week’s game.
But doing another check, he's now listed at a Reserve/Franchise player.
If Bell became a Free Agent by week 10, multiple teams would do everything they could to clear enough room to sign him.
Even teams with somewhat established Running Back groups would try to find a way to get Bell on their team.