What is Crabtree's long-term value?

For all of the hype that came with Michael Crabtree when he was the 10th overall pick in the 2009 draft, his long-term value remains a bit of a mystery. It took him four seasons before he finally broke out with 85 receptions for 1,105 yards and 9 TDs in 2012, but then a ruptured Achilles cost him most of 2013.