Thompson was placed on the 10-day injured list with right shoulder inflammation, retroactive to Sept. 3.
Thompson has been knocked around lately to the tune of nine earned runs in his last 7.2 innings. It's not entirely clear how serious this injury is, but Thompson will be eligible to return as soon as Sept. 14 with the backdated stint. Adbert Alzolay is a logical candidate to step into the rotation next week.