Entities mentioned:
- Donald Trump: Pride, Righteousness, Influence
- NFL: Security, Professional pride, Obligation
- Roger Goodell: Duty, Determination, Safety
- Allen Sills: Professional pride, Duty, Safety

Article Assessment:
Credibility Score: 75/100
Bias Rating: 55/100 (Center)
Sentiment Score: 45/100
Authoritarianism Risk: 30/100 (Generally Democratic)

Bias Analysis:
The article presents both Trump's criticisms and the NFL's data-backed responses, maintaining a relatively balanced perspective. While Trump's comments are given prominence, the NFL's safety statistics are also highlighted.

Key metric: NFL Player Safety

Ladies and gentlemen, we've got a FULL-CONTACT CLASH between the NFL and the former Commander-in-Chief! Trump is coming off the top rope with a DEVASTATING TAKEDOWN of the new kickoff rules, while the NFL is DIGGING IN ITS CLEATS, defending its game-changing play. This is a fourth-quarter showdown for the very soul of football! Trump's throwing Hail Marys, calling the new format 'demeaning' and 'unromantic', but the NFL's defense is ROCK SOLID, backed by hard-hitting stats on player safety. It's a classic matchup of old-school grit versus new-age strategy, and I'm telling you right now, this battle is far from over! The NFL might have home-field advantage with their injury reduction numbers, but Trump's got that championship mentality, refusing to let this go without a fight. It's anyone's game as we watch these titans of influence go head-to-head in the ultimate gridiron grudge match!