Romero was acquired from the Cleveland organization yesterday. He will wear #48.
This will be the third stint with the Orioles this season for Johnson, who was optioned on August 9. He won his first major league start on August 8.
Patton is 1-0 with a 2.58 ERA (52.1IP, 15ER) and 48 strikeouts in 50 appearances for the Orioles this season.
Socolovich pitched to a 6.97 ERA (10.1IP, 8ER) in six appearances for Baltimore.