PHILADELPHIA − There are several theories as to why Saquon Barkley has had trouble running the ball through the first four games of the season.

Heading into the Eagles' game against the Denver Broncos on Oct. 5, Barkley has just 237 yards rushing, averaging 3.1 yards per carry. Last season through four games, Barkley had 435 yards and was averaging 6.0 yards per carry.

So what gives? Is it Barkley? The banged up offensive line? The receivers unable to take advantage of opponents stacking the box to stop Barkley? Jalen Hurts? All of the above? Buy Philadelphia Eagles tickets

Barkley, for one, says it starts with him, and that it's absolutely not the offensive line. Looking for a free mini puzzle? Play the USA TODAY Quick Cross now.

Still, that unit is banged up. Right tackle Lane Joh

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