These players saw their fantasy values increase or decrease most based on their performances in Week 1:SizzlersWR Sammy Watkins, Kansas City Chiefs: In a career game, Watkins set personal highs for receiving yards (198) and touchdowns (3). He looks fully healthy again and with Tyreek Hill out for the next few weeks, Watkins is a player to lock into fantasy lineups everywhere.WR DeSean Jackson, Philadelphia Eagles: Jackson has been a streaky performer who has to hit on the long ball to be fantasy relevant. Jackson not only had two 50-plus yard touchdowns, but interestingly enough, he was Philadelphia’s most targeted receiver.RB Austin Ekeler, Los Angeles Chargers: Melvin who? Ekeler and running mate Justin Jackson combined for 215 total yards against Indianapolis. Ekeler did it all, both on the ground and through the air, scoring the game-winning touchdown in overtime.QB Dak Prescott, Dallas Cowboys: Prescott had a perfect passer rating in what was the best game of his career. He was focused, poised and looked every bit the part of a top-notch NFL quarterback. Granted, it was against the Giants and Prescott’s receivers were wide open most of the day, but there’s an air about Prescott and the Dallas offense that looks extremely capable.QB Case Keenum, Washington Redskins: Against a good Eagles defense, Keenum looked at ease throwing two long first-half touchdown passes. If he continues to play like this, we won’t be seeing rookie Dwayne Haskins for quite some time.FizzlersWR Mike Evans, Tampa Bay Buccaneers: Evans missed practice on Friday with a stomach bug, but was expected to be fine for a tasty matchup vs. San Francisco’s secondary. However, he caught just two of his five targets while still dealing with lingering symptoms. Hopefully, he and his fantasy owners will be feeling better this week at Carolina.WR Brandin Cooks, Los Angeles Rams: Cooks can be hit-or-miss in fantasy, but he tends to hit when targeted. QB Jared Goff struggled some on the road and also locked on Cooper Kupp in the slot as the Rams tried to stay with high-percentage passing plays. Brighter days are ahead, but with so many mouths to feed, there will be games where he will disappear again.WR Mike Williams, Los Angeles Chargers: Williams was sidelined with a knee injury in the fourth quarter after catching just two passes. He should be fine, but with Ekeler and Keenan Allen soaking up all the targets, it’s a worrisome start for Williams.RB Joe Mixon, Cincinnati Bengals: Mixon had to leave early Sunday with an ankle injury. He was ineffective while on the field, rushing six times for 10 yards. It remains to be seen whether the Cincinnati offensive line can open enough holes for Mixon this season.RB Sony Michel, New England Patriots: Seasoned fantasy veterans know all about the problem with drafting New England players; it’s near impossible to know when to start them. Michel stumbled out of the gate rushing 15 times for 14 yards.Check out FantasySharks.com for more fantasy football stats and analysis.If you love talking football, we have the perfect spot for you. Join our Facebook Group, The Ruling Off the Field, to engage in friendly debate and conversation with fellow football fans and our NFL insiders.