Manager John Gibbons said after Thursday's loss that Donaldson is dealing with a 'dead arm,' Ben Nicholson-Smith of Sportsnet.ca reports.

EDGE Analysis

Donaldson simply didn't look like himself on several throws across the diamond Thursday. He had already sat out of Toronto's exhibition games in Montreal for maintenance purposes, but it's clear that his arm still isn't 100 percent. Gibbons said that this is a case of dead arm rather than any sort of injury for Donaldson. It'll be worth monitoring whether the Blue Jays opt to deploy him as the designated hitter until his arm is back to full strength.