The difference between winning your league or going home with nothing often comes down to your draft day decisions. Luckily, the NFL preseason gives Fantasy owners a plethora of information regarding what teams and players will play like in the upcoming season.

And if you're wondering which players improved their Fantasy value the most after Week 1 of the NFL preseason, SportsLine Fantasy analyst Davis Mattek has you covered.

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. Following his advice gives you the Fantasy edge you need to dominate your draft.

One thing we can tell you: Mattek says Panthers RB Christian McCaffrey got a huge boost. 

"Maybe more so than any other player going in the first 4 rounds of fantasy drafts, C-Mac got the biggest bump by what we saw in preseason," Mattek said. "McCaffrey actually played on each of the 14 snaps Cam Newton played, and was used as a true RB1, a real workhorse type of runner. He rushed four times, and encouragingly scored a 2-yard rushing touchdown, while also getting two targets in the passing game. Right now he is being drafted later than guys like Devonta Freeman and Dalvin Cook who he would be clearly superior too if he was getting 70% of the backfield work as well as goalline rushes in Carolina."

Mattek has also identified six additional players who saw their Fantasy stock rise after the first full week of preseason games.

So which players saw their Fantasy stock rise after Week 1 of the NFL preseason?... Join SportsLine now to see Davis Mattek's list of players who saw their Fantasy stocks rise the most after Week 1 of the NFL preseason, all from one of the top Fantasy experts in the nation.