Jackson Whistle stopped all 19 shots he faced as the Rockets blanked the Brandon Wheat Kings 3-0 on Wednesday to claim the Western Hockey League's Ed Chynoweth Cup with a four-game sweep.
Rourke Chartier and Leon Draisaitl opened the scoring with short-handed goals 19 seconds apart in the third period. Nick Merkley rounded out the Kelowna attack 13 minutes later.
Jordan Papirny stopped 27 shots for Brandon.
It was the Rockets' second sweep this post-season. They beat the Tri-City Americans in four straight games in the first round.
Kelowna is the first team to qualify for the 2015 Memorial Cup by winning their league title. The Quebec Remparts of the Quebec Major Junior Hockey League already qualified as the hosts of the tournament, which starts May 21st.