Donald missed five days last week after suffering a bruise on his hand, but started against the Cubs on Friday. One day later, he entered a Cactus League contest against the Mariners and said he felt some pain during a swing. An MRI exam on Saturday revealed a bone bruise.
— From Bastian. All indications in the article seem to be that Donald is still the prohibitive favorite at 3B if he can get healthy in the next week or so.