The Cowboys placed running back Tyson Thompson on injured reserve because of a broken left ankle suffered Sunday and re-signed running back Keylon Kincade.
Kincade has spent parts of the last three seasons on the Cowboys' practice squad. He was released from the practice squad this year on Sept. 6. In the preseason, Kincade ran 12 times for 36 yards.
I would guess they signed him to be the 3rd RB, and that either Green or MB3 will return kicks.
Hat tip to dunkman for posting the news