On Monday, July 6, 2020 at approximately 6:00 a.m., MDT, a BNSF freight train derailed 29 railcars on the Gallup Subdivision near Winslow, Arizona.  No injuries were reported.  There were no hazardous materials released.  The probable cause is cause code H519- Dynamic Brake, too rapid adjustment.  Contributing to the cause of the derailment was a block of 5 empty cars placed ahead of a block of 6,900 trailing tons, cause code H-504- Buffing or slack action excessive, train make-up and FRA fatigue analysis sound fatigue was present in both the engineer and conductor which may have had a contributing effect, cause code H199- Employee physical condition.