Hyatt started his professional baseball career with the Vancouver Beavers of the Northwestern League. In 1908, he hit.323 with 15 home runs. He led the league in hits, home runs, and runs scored.
He was purchased by the Pittsburgh Pirates after the season.
From 1909 to 1914, Hyatt served mostly as a pinch hitter for the Pirates. He also had one-year stints for the Saint Louis Cardinals and the New York Yankees.
After his time in the major leagues ended, Hyatt played in the minors. He spent 1920-1923 with the Pacific Coast League"s Vernon Tigers, hitting over.300 each year.