Tanaka threw 49 pitches in a simulated game Thursday morning at Comerica Park in Detroit, where the Yankees are finishing up a three-game series.
Tanaka has been on the disabled list since early July with right elbow inflammation.
The pitcher told YES Network that he felt normal soreness after the simulated game and that he he has no date in mind about when he might return. He said he is more cautious than excited at this point in rehab process
At the time he was injured, Tanaka led the American League with 12 wins and had a 2.51 ERA.
The Yankees have won seven of their last 10 games and sit six games back of the Baltimore Orioles in the American League East. They are 2.5 games out of the second wild-card playoff spot.
- Scooby Axson