In the same spirit as recent examples like Marian Hossa (Chicago Blackhawks), Zdeno Chara (Boston Bruins) and Nicklas Lidstrom (Detroit Red Wings), Thornton has served as the Sharks' critical veteran presence throughout San Jose's postseason run to the Stanley Cup Final.
The Pittsburgh Penguins lead the best-of-7 series 3-2. Game 6 is at SAP Center on Sunday (8 p.m. ET; NBC, CBC, TVA Sports).
Thornton, 36, has 18 assists, which ranks second to teammate Logan Couture (20) among all players this postseason. Thornton's 18 assists are the most in a single NHL postseason by a player aged 35 or older.