Reitz started three games last season, playing in 14 games overall.
The Colts rushed for 1,743 yards last season, their most since 2006, and quarterback Andrew Luck passed for 3,822 yards last season.
Reitz was originally claimed by the Colts off waivers from the Miami Dolphins in 2010. For his career, he has appeared in 34 games and has made 20 starts.
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Aaron Wilson covers the Ravens for The Baltimore Sun