Hainsey will be an unrestricted free agent after the season and the Penguins said Carolina will retain 50 per cent of his remaining salary , which had to be part of the trade .
The Penguins are up so tight against the NHL 's salary cap .
Hainsey will be an unrestricted free agent after the season and the Penguins said Carolina will retain 50 per cent of his remaining salary , which had to be part of the trade because the Penguins are up so tight against the NHL 's salary cap .