The Reds won't carry three catchers on their Opening Day roster, so Turner will only make the team if Devin Mesoraco begins the year on the DL.
A Rule 5 pick from the Twins, Turner isn't even guaranteed to be the guy the Reds turn to if Mesoraco begins the year on the DL, but he has the advantage of a shorter path to the 40-man roster than teammate Rob Brantly.