It's been an eventful preseason, and If you've waited this long for your Fantasy football draft, you can still adjust your board. If not, there's always the waiver wire and trades.

And before you determine which players have seen big shifts in their Fantasy value in the preseason, you need to see what SportsLine Fantasy analyst Davis Mattek has to say.

Mattek has been working in the Fantasy industry since his college days and has contributed to virtually every meaningful publication and website in the industry. He's hosted podcasts with over two million listens and been nominated for several FSWA awards, including Football Writer and Best Podcast. 

One massive change he's identified: Emmanuel Sanders is now a trendy WR2 selection.

"Drafters realized at some point that the quarterback play in Denver last year was so horrendous there is almost no way that Thomas and Sanders could provide worse production than they did last season," Mattek said. 

Mattek has also revealed a running back who came out of nowhere in the preseason to enter the top-20 at his position, and found team that has completely changed its offensive identity. 

So what preseason changes are rocking Fantasy rankings? Join SportsLine now to see Davis Mattek's list of the five preseason changes you need to know about before the start of the Fantasy season, all from an experienced Fantasy expert who can give you a huge edge in your draft.