The Brewers reinstated Frelick (shoulder) from the 10-day injured list Tuesday, though he's not in the lineup against the Mets, Adam McCalvy of MLB.com reports.
The outfielder has been on the shelf since just after the All-Star break due to a shoulder strain, and he's now back on the active roster after posting a .951 OPS with four doubles and two homers during a 10-game rehab assignment. Frelick's .631 OPS through 90 games this season would be a career worst, so he may need to improve his offensive production to fend off Luis Lara for playing time.