He stopped getting touches.
Dude was 4yrs for 4 straight pro bowls and 4 1000yd seasons. He played for NY (the worst offensive line at the time) limited opportunities and then for Baltimore, also limited opportunities.
He is still getting the short stick. He’s still got the talent. I have no idea why he’s been banished to fantasy purgatory tho. It’s not like you just lose the gift all of a sudden. He’s only 28. He still got the juice. But Dallas ain’t thirsty.