Masterson had a rough go of it before he got injured, as his ERA is still 5.58 after his good start on Sunday. His xFIP is 4.71 with a WHIP of 1.59, and he's only striking out six batters per nine innings, so it's safe to say that you can't judge him solely off of yesterday's start. He will have a home start against the Astros July 4th weekend. Before doing anything with him in fantasy, see how he fares in that start.