Bug Model's posture gets altered

Question regarding model posture during an animation. I have a simple walking animation for my character in Blender that looks normal, but when importing to Unity the model gets distorted. For the walking animation his upper half is turned to the right. No idea why this is happening. I have altered the settings between legacy, humanoid, and generic, over and over. All that seems to do is either make it work or not. I have also messed with resetting the scale and transformation settings before exporting. All that seems to do is change the direction my character faces on important. But regardless his waist is still twisted to his right. See attached screenshot. Any feedback would be great, thank you.