Olson (shoulder) will throw a bullpen session Wednesday.
Wednesday will mark Olson's first time throwing off a mound since landing on the injured list in late July, as he had been limited to playing catch off flat ground up to this point. He'll presumably need to throw several additional bullpen sessions before progressing to live batting practice and eventually a minor-league rehab assignment, but he should have enough time left in the season to return to the Detroit rotation.