Mullins was removed from Friday's game against the Astros due to left quad tightness, Roch Kubatko of MASNSports.com reports.
EDGE Analysis
Mullins went 0-for-1 with a walk before his quad forced him to come out of Friday's contest in the fifth inning. If the 29-year-old is forced to miss any amount of time, Austin Slater, who entered as Mullins' replacement, would be the favorite to pick up additional starts in the outfield.