Masset was called up from Triple-A New Orleans on Tuesday. Masset will replace Jose Urena on the 25-man roster and Matt Tracy on the 40-man, after impressing in a handful of appearances with New Orleans to start the year. However, the right-hander struggled to a 5.80 ERA and 1.78 WHIP in 51 appearances with the Rockies last season and isn't likely to take on meaningful innings anytime soon.