What's trending in the NFL: Derek Carr's prank and Week 4 fantasy tips

Derek Carr still available in many fantasy leagues (0:43)

With a low ownership percentage in ESPN.com fantasy leagues, Field Yates offers his take on how Raiders QB Derek Carr can help your team in fantasy football. (0:43)

On Tuesday, we learned about how Derek Carr pranked his brother growing up and the No. 1 team in ESPN's Power Rankings. Here's a look at the top stories:

Top stories

Best stat

According to the ESPN Football Power Index, there is a 2.2 percent chance that at least one team finishes 16-0 this season, and the Cardinals are the most likely team to accomplish that feat (0.9 percent chance).