The 22-year-old forward had NHL career highs in goals (20), assists (18) and points (38) in 66 games with the Ducks last season. He had no points in four games during the Stanley Cup Playoffs.
"Ondrej is a skilled player that has a bright future in this league," Ducks general manager Bob Murray said. "He can skate and score, and will continue to improve as a player as he gains more experience."
The Ducks selected Kase in the seventh round (No. 205) of the 2014 NHL Draft. He has 53 points (25 goals, 28 assists) in 119 regular-season games, and two goals in 13 playoff games. He is the only player from that seventh round to play in the NHL.
