According to Adam Caplan of ESPN, Broncos safety Darian Stewart has been fined $18,231 for his helmet-to-helmet hit on Panthers quarterback Cam Newton.
The NFL is also reportedly reviewing hits on Newton by both Von Miller and Bradley Roby.
This week the NFL announced it will spend an additional $100 million to develop new technology and support more medical research into the growing problem of head injuries.
Commissioner Roger Goodell announced the "Play Smart. Play Safe" initiative in an open letter Wednesday.
He writes: "When it comes to addressing head injuries in our game, I'm not satisfied, and neither are the owners of the NFL's 32 clubs. We can and will do better."
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