Belisle was assigned to Triple-A Louisville and was called up to the majors on September 7, 2003, making his debut that same day.
In his debut, he pitched 2 innings, giving up a solo home run and walking one.
In 6 relief appearances, he had a 1-1 record and a 5.20 ERA.
Belisle did not play in the majors in 2004.
He spent the entire year in Triple-A and struggled with a 9-11 record and a 5.26 ERA in 28 starts.

In 2005, Belisle spent the entire year in the majors, mostly pitching out of the bullpen.
He made 5 starts and 55 relief appearances with an ERA of 4.41.
He went 2-0 with a 3.60 ERA in 40 innings in 2006, but missed a big chunk of the season with a back injury.
In 2007, in a career-high 30 starts for the Reds, Belisle went 8-9 with a 5.32 ERA after winning the number five spot in the starting rotation, after being mostly a reliever the past two years.
In 2008, he struggled in 6 starts with a 1-4 record and 7.28 ERA before being sent down to Triple-A and being reconverted into a relief pitcher.
Belisle was assigned to Triple-A Louisville and was called up to the majors on September 7, 2003, making his debut that same day. In his debut, he pitched 2 innings, giving up a solo home run and walking one. In 6 relief appearances, he had a 1-1 record and a 5.20 ERA. Belisle did not play in the majors in 2004. He spent the entire year in Triple-A and struggled with a 9-11 record and a 5.26 ERA in 28 starts.
In 2005, Belisle spent the entire year in the majors, mostly pitching out of the bullpen. He made 5 starts and 55 relief appearances with an ERA of 4.41. He went 2-0 with a 3.60 ERA in 40 innings in 2006, but missed a big chunk of the season with a back injury. In 2007, in a career-high 30 starts for the Reds, Belisle went 8-9 with a 5.32 ERA after winning the number five spot in the starting rotation, after being mostly a reliever the past two years. In 2008, he struggled in 6 starts with a 1-4 record and 7.28 ERA before being sent down to Triple-A and being reconverted into a relief pitcher.
Matt Belisle