Board Thread:Theories and Speculation/@comment-33485854-20180625233306/@comment-26107879-20180630190012

Littlegen wrote: He met the requirements for the Rinnegan before his near death experiance, and Hagoromo granted amped his his Yin half. When he gave him the Seal.

That wasn't stated or shown. Therefore it's a theory. I would like to think Kabuto gave him Hashirama's DNA when he healed him, but that will always be a theory until proven right. The wiki likes to give credit to Hagoromo for Sasuke's Rinngean. There's about five different profiles that give him the credit. I can see why, the Manga kind of implies it. But it never explains it. So my point stands.