Duke linebacker Kelby Brown suffered his fourth serious knee injury in the last five years.
![](https://accsports.com/wp-content/uploads/migrated_files/CGLWMCRVFXQLQSJ.20131028151359.jpg)
Kelby Brown suffered a fourth knee injury, which will end his college career (AP)
Duke linebacker Kelby Brown suffered his fourth serious knee injury in the last five years.