Donaldson (calf) went 0-for-2 in his first rehab appearance Monday for High-A Dunedin, Mike Wilner of Sportsnet 590 The Fan reports.
Donaldson has no official timetable for a return to the Blue Jays, who have missed the perennial MVP candidate since he went down in mid-April. Expect him to need a couple more rehab games at Dunedin, but it's possible that he could be back in uniform for Toronto by the end of the week.