Well he can't be signed by anyone till March 15 after 3:59. New NFL year. No reason for him not to visit other teams. Watching the offense last year there was a complete lack of creativity. Does Pete break out of his conservative un-creative style? Doubt it.
He can be signed right now. He was released to be a free agent, not a guy who's contract expired. Those guys have to wait. Carr also won't count against a team for the comp pick calculation.