"Paul's a very good defender," Showalter said. "He's a very reliable baseball player. He's one of those guys that's going to be able to do whatever he wants to do in the game one day. He understands who he is and what he brings, and you know you're going to get it from him.
"He's as good a shortstop as you're going to find out there for this role."
J.J. Hardy hasn't played yet due to back spasms, and he isn't expected to until March 10, and while Hardy is out, Manny Machado is playing shortstop until he leaves to play for the Dominican Republic on March 5.
On Feb. 7, the Orioles added infielders Robert Andino and Johnny Giavotella, and on Feb. 13, they brought in another infielder, Chris Johnson, and now Janish.
"Look at where we are depth-wise compared to where were this time last year, and where we were two weeks ago," Showalter said.
Catcher Welington Castillo, who was scheduled to play on Saturday, is out with neck spasms.
The Orioles maintain interest in left-handed pitcher T.J. McFarland, who was designated for assignment last week. They hope to sign him to a Minors contract.