When Kansas City Chiefs quarterback Patrick Mahomes suffered a season-ending injury last season, a veteran tight end texted him that he was “here for [him]” on the “lonely road ahead” of rehabilitation. That tight end was none other than Zach Ertz of the Washington Commanders. As the two players started to share their comeback journey over texts, Ertz reached out once more as the Chiefs star QB reached the end of his rehabilitation. “Bro, you’re…