literally from your article
Newton injured his throwing shoulder in December of 2016 trying to make a tackle after he threw an interception.
“I threw an interception,” Newton said. “I tried to go make the tackle, and I tried to push him out, and I extended my arm, and I messed up my AC joint. And ever since then, there’s just been a part of me that’s just been a wounded dog. Like a wounded lion almost. Just, ‘I’m not right.’ I feel good at times, but when I’m running I still feel it. So instead of running them over, I’m going to turn this shoulder and just go down.”