Cowboys QB Dak Prescott plans to undergo season-ending surgery, according to reports USA TODAYSources: Dak planning on season-ending surgery ESPNCowboys QB Dak Prescott still seeing doctors, hoping to avoid season-ending hamstring surgery NFL.comDak Prescott planning to undergo season-ending hamstring surgery NBC SportsCowboys placing Dak Prescott on IR with hamstring injury, says Stephen Jones Yahoo Sports