Khris Davis and Mark Canha have been practicing the anti-handshake method for a while now with their celebratory Bash Bro celebrations at home plate.
So, this doesn't necessarily pertain to them when it comes to dealing with the latest coronavirus pandemic.
The celebratory act of tapping one another's elbows together originated with the OG Bash Bros back when the A's had Mark McGwire and Jose Canseco on their team. And Canseco wanted to promote his own PSA to remind you to bump elbows rather than a handshake:
Remember Don’t Shake Hands, Bash Instead! #CoronaVirus #WashYourHands pic.