Cleveland Guardians' catchers struggling, top prospect Bo Naylor waiting in wings

The Cleveland Guardians catchers have the worst offensive numbers in MLB this season.
Mike Zunino, the Guardians' main catcher, has struggled at the plate and defensively.
Bo Naylor, one of the Guardians' top prospects, has hit well in Triple-A and is ready for the majors.
The Guardians have likely passed the point where calling up Naylor would impact his service time and cost control.
There are no reasons Naylor shouldn't be joining the Guardians catching crew immediately.