"I was able to get on the [treadmill] today and do some light running and a little bit more aggressive agility stuff, and able to do some baseball activities -- hitting and taking some ground balls and playing catch. … It's going to be one of those things where it's gradual. But hopefully, we continue progressing in the right direction."
Donaldson has been limited to only nine games this season since being placed on the 10-day disabled list on April 14.
The 2015 American League Most Valuable Player began dealing with right calf issues during the first week of Spring Training, when he injured it while running sprints and was forced to sit out until the final week.