Donaldson (hamstring) said Thursday he recently sliced his thumb, which has delayed him from beginning a rehab assignment, Max Goodman of The Newark Star-Ledger reports.
Donaldson said Thursday that he was "putting something together" with his daughter when he suffered the cut. It's not a huge setback -- his hamstring is almost fully healed -- but he might not get into minor-league rehab games until sometime next week. The veteran third baseman has been on the shelf since early April.