Chacon would come into and compete for a spot in the starting rotation with Roy Oswalt, Brandon Backe, Woody Williams, Wandy Rodriguez and Chris Sampson. Sampson might be the odd man out ..... but either as a starter of a reliever Sampson will contribute. If Sampson beats Chacon out for the 5th starter role ...than Chacon would assume the reliever/spot starter role. The Astros would be Chacon's 4th team in 8 major league seasons. In 64 appearances last year ....Chacon went 5 and 4 with a 3.94 ERA.