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In spite of his $7 million cap hit, Thornton is still only 32 years old and has two more seasons on his current deal. And, after moving Dany Heatley and Devin Setoguchi last summer, it appears there isn't a player on the Sharks roster that isn't available for Doug Wilson.
Chicago has shown since winning the Stanley Cup that they haven't added enough toughness to their roster. Thornton could effectively end the Patrick Kane At Center Experiment in Chicago while providing the physical play the Hawks have desperately lacked.
The Hawks will have some cap space to work with this summer, and have plenty of good prospects to deal if the Sharks were interested.