A third-round draft pick by the Houston Astros in 2005, the Manzella worked his way onto the big-league roster in late 2009 and played in 83 games for the club the following season. The right-handed hitter batted just .224/.266/.262 overall with a lone home run in his 90-game stint with the 'Stros.
Manzella has bounced around quite a bit since his last appearance in the bigs in 2010. He was picked up off waivers by the Diamondbacks in August of 2011, then signed and released by both the Milwaukee Brewers and Chicago White Sox this past season.
The 29-year-old is not a good bet to make the Rockies' roster out of spring training, but he may get a chance with the club if Troy Tulowitzki continues to have trouble staying off the disabled list.