Because he literally said that to the Houston Chronicle: Baker said he would rather stay away from a rookie-rookie pairing on the mound and behind the plate when he can. https://www.houstonchronicle.com/te...tin-maldonado-yainer-diaz-lineup-18138846.php Perhaps pick up a newspaper?
It's hard when they strike out on pitches in the dirt for your whole career, and then they just stop swinging at them.
At some point when Yordan comes back there will be no choice but to start Diaz at catcher. And Baker should be fired if he doesn't oblige.