Brewers manager Craig Counsell said Wednesday that Houser (groin) will open the season on the 15-day injured list and is expected to miss about three weeks, Adam McCalvy of MLB.com reports.
Houser suffered the right groin injury in Saturday's outing versus Oakland. The right-hander, who regressed with a 4.73 ERA as a starter last season, could see time as both a starter and reliever once off the injured list.