Simpson threw the water bottle while serving a penalty in the third period against Toronto in Chicago on Thursday night.
The Blackhawks, who lost 10-3, trailed when Simpson was assessed a penalty. A spectator near the penalty box began heckling the 29-year-old forward and Simpson hurled a container over the barrier, striking a man on a shoulder. The fan was ejected by United Center security staff.
"There can be no excusE for any contact with fans by NHL personnel," NHL senior vice president Colin Campbell said.
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