By Dan Lyons Philadelphia will look to move to 4–0 on Sunday against Jacksonville. As the NFL enters the fourth week of the season, it certainly appears that the league has reached an impressive level of parity. Following Thursday night’s Bengals win over the previously undefeated Dolphins, there is now just one remaining unbeaten team in the league: the 3–0 Eagles. Philadelphia has been very impressive to open their second season under Nick Sirianni. After a narrow 38–35 win over the Lions, another 2022 upstart, to open the year, they blasted the Vikings 24–7 in Week 2 and posted a 24–8 blowo…