 In 2004 and 2005, he played collegiate summer baseball for the Falmouth Commodores of the Cape Cod Baseball League, and won West Division MVP at the league's 2004 all-star game.He had a key part in the 2006 championship series between Oregon State and the North Carolina Tar Heels.Buck won game three of the series after pitching just two days before in game one, sealing Oregon State's first baseball national championship.