Colorado's Calderon out 4-5 months

Colorado Rapids defender Diego Calderon is expected to miss the next 4-5 months after undergoing microfracture surgery on his right knee on Thursday.

Calderon started each of Colorado's first four games this season, but suffered the injury in his team's defeat against the Los Angeles Galaxy on Saturday when he crashed into the goalpost while clearing a shot off the goal line.

The 26-year-old joined Colorado in the offseason from Liga de Quito in Ecuador.