What are the terms of his NTC?
Arguments could be made that Carle would fit in or improve 2/3rds of the defenses across the league. Anaheim, Arizona, Boston, Buffalo, Carolina, Colorado, Columbus, Dallas, Detroit, Edmonton, New Jersey, NYI, NYR, Ottawa, Philadelphia, San Jose, St. Louis, Toronto, Vancouver, Washington, and Winnipeg. Half of them would want to send back a worse defenseman or other equally bad contract, but, all have varying degrees of need for a veteran LD heading in to free agency.
I don't think Carle straight up returns anything of value. At best, Yzerman can convert Carle's contract into something that clears sooner. At worst, it costs significant draft picks or minor league talent to move Carle for irrelevant returns. Combining the negative trade value with the fact that Carle still financially fits on the Lightning for at least one more year...
...I don't believe Yzerman will force a Carle trade this offseason.
Tie this scapegoat back to the whipping post, he's going nowhere until we've bled him dry.