The news comes just 11 days after Mitchell was struck in the face by a line drive in a victory over the Minnesota Twins at Yankee Stadium on Aug. 17.
The 24-year-old left the game with a small nasal fracture.
You can watch the incident here.
Mitchell, who started that game against Minnesota, will return to the Yankees bullpen.
In 10 games this season, Mitchell is 0–1 with a 3.86 ERA in 21.0 innings.
The Yankees optioned pitcher Nick Goody to Triple A Scranton/Wilkes-Barre following Wednesday’s game.
New York currently trails the Toronto Blue Jays by 1.5 games for first place in the American League East.
- Kenny Ducey