Source: New deal worth $25M
The deal is worth $25 million, a source told ESPN.com's Pierre LeBrun.
Voynov led the Kings in goals (6) and total points (13) in their postseason run that ended with a loss to the Chicago Blackhawks in the Western Conference finals.
The 23-year-old Russian skated in all 48 of the team's regular-season games this year and had new career highs for both points (25) and assists (19) during the regular season.
Information from The Associated Press was used in this report.