Mastny split last season between the Indians and Triple-A Buffalo. With Cleveland, Mastny went 2-2 with a 10.80 ERA in 14 games. He was 2-2 with a 1.78 ERA in 28 games for the Bisons.
The 27-year-old went 7-2 for the Indians in 2007, his first full season in the majors. In 2006, he recorded five saves in the closer's role over the final six weeks after beginning that season at Double-A Akron.