The Royals transferred Mears (shoulder) to the 60-day injured list Tuesday.
The right-hander has been on the shelf since late May due to a shoulder impingement and experienced soreness after throwing live batting practice last week, per MLB.com. It's the second time Mears' throwing program has been paused in the past month due to the lingering soreness, and he's now awaiting the results of an MRI. He's not likely to be ready to be reinstated when first eligible in late July.