Bourne took the lead 5-3 entering into the last inning. Relief pitcher Jonas Lukowiz shut down Gateway to preserve the victory.
The Knights move on to face second-seeded Nauset Sunday, August 10, at 5 PM at Cape Cod Tech in Harwich for the league championship.
Downes hit 83 percent of his shots (1,280 for 1,528).
Individuals who have played soccer, enjoy the sport, or have an interest in the sport are encouraged to sign up to become a soccer official.
United travels to face the Nauset Storm August 6 in Orleans.
The field includes several Olympic medalists and record-holders.
Falmouth hopes to bounce back in its first playoff game on Sunday, August 3, at 5:30 PM at Trotting Park.
Recap of the week for the Cape Cod Baseball League.