I've thought about writing this blog for some time now. I trust that Donaldson is surrounded by professionals so I've restrained myself from writing on this subject.
I'd like to start with personal testimony. A short time ago, I had a surgery and was bed ridden for some time. As soon as I went back to my walking. As usual I stretched out and started my walk. I started out with just a short walk but my calves and hamstrings cramped up like everything. I knew muscle cramps is a deficiency of magnesium. So I started to take magnesium supplements and the cramps went away immediately. Recently I reduced and eliminated taking supplements and my legs started to tighten up when I stretched out.
I'm sure Donaldson goes through a regiment of stretching, massages, soaking, use heavy duty calf supports and even most likely was tested for magnesium deficiency. But magnesium blood tests can be deceiving. Magnesium is necessary for proper cell development like muscle, nerve, bone etc. most Americans are deficient of it.
I don't recommend Donaldson to nurse his big calves with "milk of magnesium" (sorry I couldn't resist). But I do suggest maybe a magnesium cream, a magnesium sulfate (Epsom salt) soak. Donaldson really works those calves so he might need to take magnesium supplements. Magnesium is normally safe but you can over do it so I recommend to consult his health care giver.
I'd really like to see him overcome this problem and be a super star with the Twins.