The Chicago Blackhawks have signed defenseman Riley Stillman to a three-year deal with an average annual value of $1.35 million, the team announced Sunday.

Stillman, 23, was set to become a restricted free agent this offseason.

The Blackhawks acquired the 6-foot-1 blue-liner from the Florida Panthers in April. He's appeared in six games for Chicago, registering 16 hits while averaging 16:43 of ice time.

Originally selected by Florida in the fourth round of the 2016 draft, Stillman has notched five assists over 49 NHL contests.

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