NFL's Mario Edwards Jr.

Chicago Bears defensive lineman Mario Edwards Jr. has been charged with assault over an alleged domestic violence incident -- but Edwards is adamant he did NOTHING wrong.

TMZ Sports has learned ... prosecutors in North Carolina are moving forward with an assault case against the 26-year-old NFL player, a 2nd round pick in the 2015 NFL Draft.

We've obtained court documents outlining the allegations against Edwards by a woman who says she had a dating relationship with him.

In the docs, the woman claims Edwards got violent with her in a North Carolina hotel room on October 17, 2020 (the day before the Bears played the Carolina Panthers). She says Edwards got aggressive when she turned down his…