Jake Kaplan of the Houston Chronicle reports that the Astros have placed Kevin Chapman on waivers for the purpose of removing him from the 40-man roster.
If he clears waivers, the left-hander will be outrighted to Triple-A Fresno. Chapman, who is currently pitching for Canada in the World Baseball Classic, holds a 4.09 ERA across 58 relief appearances over parts of the last four seasons with the Astros.