 Beck began his professional baseball career in 2006, as he appeared in 16 games with the Yakima Bears of the Northwest League, going 1–5 with a 6.25 ERA im 40.1 innings pitched.In 2007, Beck moved up to the South Bend Silver Hawks of the Midwest League, where he appeared in 31 games, all in relief, as he had a 1–2 record with a 4.33 ERA in 52 innings pitched

He began the 2008 season with South Bend, working out of the bullpen, as in seven games, he posted a 2–0 record with a 2.04 ERA, earning 19 strikeouts in 17.2 innings pitched.Beck was then promoted to the Visalia Oaks of the California League.