Polanco (Achilles) will begin a rehab assignment at Triple-A Syracuse on Saturday, Will Sammon of The Athletic reports.
Polanco originally began a rehab assignment in late May, but the Mets shut him down in early June after he reported renewed soreness in his ankle. Now ready to return to a competitive setting, the 32-year-old will work exclusively as a designated hitter while he ramps up and could eventually take over as the Mets' primary DH once activated.