Domingo German of the Yankees received a ten-game suspension for a sticky substance on his hand:

German will not appeal and began serving the suspension Wednesday. He cannot be replaced on the roster and the Yankees will be forced to play with 25 men instead of 26.

ESPN.com

One wonders how teams ever played with a 25-man roster all those years! Luckily for the Yankees, Luis Severino is due back, so they’ll be short a reliever, not a starter.