NFL Week 4 overreactions and reality checks: Packers best in NFC? Chiefs best in AFC? Saquon Barkley best RB?

The NFL is still unpredictable through four weeks of the season. The Philadelphia Eagles are the lone unbeaten team at 4-0 and the Houston Texans are the only winless team through the first four games. The Atlanta Falcons and Seattle Seahawks are 2-2, the same record as the Denver Broncos and Los Angeles Chargers…