Since returning from injury, Sam Darnold has struggled to shake off the rust, throwing for just 168 yards while completing 59% of his passes in his latest outing against the Los Angeles Chargers. If the Seattle Seahawks are going to want to defend their title, Darnold must round back into form or else risk falling short in their efforts of repeating as champions.While Darnold has been unable to get back into a groove, Brock Purdy has built a strong case for winning the MVP award while leading the San Francisco 49ers to a 4-0 start to the year. Even with his supporting cast dealing with injuries, Purdy has had no issue with moving the ball down the field, leading an offense that ranks near the top of the board in most offensive metrics. San Francisco 49ers @ Seattle Seahawks best betsSeattle Seahawks -3: -115 with CaesarsSam Darnold over 228.5 passing yards: -114 with FanDuelChristian McCaffrey under 53.5 rushing yards: -114 with FanDuelUnfortunately for Purdy, negative regression is looming large on Sunday as he faces off against a defense that currently ranks in the top-5 in Def DVOA, EPA Allowed per play, and in Success Rate. Especially with Mike Evans dealing with an injury, allowing the Seahawks to shade their coverage towards George Kittle while spying a linebacker on Christian McCaffrey to help bottle up the star duo.Speaking of McCaffrey, the 49ers dynamic running back will be in for a long night while battling it out against a front seven that excels at stuffing the run per their above league average marks in Def Rush EPA. With Seattle’s corners capable of holding their own in single coverage, the Seahawks can stack the box at a higher rate, forcing McCaffrey to fight off contact before crossing the line of scrimmage.With McCaffrey struggling to get the ground game going, the 49ers will be overly reliant on Purdy’s arm to stay ahead of the sticks, making them too one dimensional to sustain drives down the field. When held into an early out, this will lead to an uptick in the Seahawks total number of scoring opportunities, improving their probability of winning while controlling the time of possession.More time on the field will also lead to a bump in Sam Darnold’s usage rate, shading value towards the over on his Passing Yardage prop. Even with clear advantages on both sides of the field, oddsmakers believe the score will be tight until the very end, forcing Darnold to air out the ball instead of reverting to a run-heavy game script in an attempt to bleed out the clock. San Francisco 49ers @ Seattle Seahawks previewWith continuity at all three levels of the defense, the Seahawks are poised to make another run at the Super Bowl. Not only do they excel at stuffing the run, the secondary has been able to smother opposing pass catchers, entering Sunday ranked in the top-10 in Def Pass DVOA and in Success Rate.In a highly anticipated matchup against the 49ers, Seattle’s defensive line will need to continue to generate pressure up front in order to get the ball out of Purdy’s hands shortly after the snap, making it easier for the Seahawks secondary to smother his passing lanes. When protected, Purdy has been surgical this season, leading the league in QB EPA per play while averaging 7.9 Air Yards.With less time to go through his progressions, the amount of Havoc in Purdy’s throws will skyrocket, making it difficult to connect with his pass catchers while the Seahawks create disruptions at a higher rate. Extra bodies near the point of contact will also lead to an uptick in turnover worthy plays, potentially flipping the field in the Seahawks favor. When on offense, Darnold will have a great opportunity to find his footing by carving up a 49ers defense who struggles to hold opponents in front of the sticks per their bottom sixteen mark in Def Dropback EPA. Nick Bosa potentially sitting out will also allow Darnold to operate in the pocket instead of having to throw on the run, improving the quality of his throws. San Francisco 49ers @ Seattle Seahawks betting tipsWith the 49ers dealing with injuries on both sides of the ball, the Seahawks are in a great position to secure the pivotal win and take back sole possession of first in the NFC West. Seattle Seahawks -3Not only have the 49ers struggled to defend against the pass, the front seven has been vulnerable to getting gashed on the ground, limping into Week 5 ranked 31st in Def Rush Success Rate. By allowing Emanuel Wilson to consistently cut the distance to gain in half with each carry, the Seahawks will be near the line to gain on later downs, increasing their chances of converting.When backed up into the red zone, the 49ers will be forced to shade their coverage towards Jaxon Smith-Njigba, freeing up more space in the middle for Wilson to exploit. By keeping the ball on the ground, the Seahawks will also negate the possibility of Darnold throwing an interception in the shortened field, turning their scoring opportunities into points on the board to help cover the spread. Place a wager on the Seahawks to cover the -3 spread at -115 with Caesars Sam Darnold over 228.5 passing yardsAfter playing at a high level last year, Darnold has struggled to build on his momentum while dealing with a leg injury, dropping him down to the bottom half of the board in QB EPA per play while completing just 65.2% of his passes. Until Darnold can round back into form, the Seahawks will continue to play in high variance contests, an unsustainable style of play.Luckily for Darnold, Wilson will be able to pull the 49ers linebackers to the middle while consistently gashing the front seven, widening the width of Darnold’s passing lanes on the outside, leading to a higher completion percentage. For some more exposure, escalator bet Darnold’s Passing Yardage prop by placing smaller wagers on his alternate overs at the best available odds across multiple sportsbooks. Bet Sam Darnold to throw for more than 228.5 passing yards at -114 with FanDuel Christian McCaffrey under 53.5 rushing yardsSince the start of the regular season, Christian McCaffrey has been able to successfully hit the ground running, ranking in the top-15 in Yards Over Expected per Attempt while averaging 4.4 Yards per Carry. Even with his offensive line ranking just league average in True Run Block Grade, McCaffrey has been able to brush aside bodies and generate extra yards after contact.With the Seahawks plugging McCaffrey’s running lanes across the line of scrimmage, the 49ers star running back will consistently be slowed down in the backfield, keeping him under the total on his Rushing Yardage prop. To help counter the Seahawks relentless pressure, the 49ers will send McCaffrey out to the flats to get him in the open field, trading carries for receptions which will further chip away at his total number of rush attempts. Back Christian McCaffrey to run for less than 53.5 yards at -114 with FanDuel San Francisco 49ers @ Seattle Seahawks injury reportBelow is a breakdown of the 49ers and Seahawks injury report heading into Week 5.San Francisco 49ersOut: Marques Sigle (S)Questionable: Mike Evans (WR), Upton Stout (CB)Doubtful: Nick Bosa (EDGE)Seattle SeahawksOut: N/AQuestionable: Leonard Williams (EDGE)Doubtful: N/AWhile the Seahawks are fairly healthy, the 49ers may be without two of their best players if Mike Evans and Nick Bosa are unable to suit up.s he is arguably one of the most talented wide receivers in the league. San Francisco 49ers @ Seattle Seahawks game infoDate: Sunday, October 11thTime: 4:25pm ESTVenue: Lumen Field – Seattle, WashingtonWhere to Watch: FOXAbout the authorKody MalstromKody Malstrom is a professional sports bettor and sports betting journalist with six years of experience covering a vast majority of sports. He covers football, basketball, hockey, baseball, and the UFC in written and video form.Born and raised in Michigan, Kody is a Detroit sports fan who spends all of his Sundays in the fall rooting for the Detroit Lions and Saturdays watching as much College Football as possible. In the winter, he shifts his focus to the Detroit Red Wings and Pistons while simultaneously rooting for his North Carolina Tar Heels.When he is not staring at betting markets, you can find Kody at the beach or snowboarding down a mountain, depending on the time of the year.Commercial content notice: Taking one of the sportsbooks offers featured in this article may result in a payment to talkSPORT. 21+. T&Cs apply. Gambling Problem? Call 1-800-GamblerResponsible gambling Remember to gamble responsiblyA responsible gambler is someone who:Establishes time and monetary limits before playingOnly gambles with money they can afford to loseNever chase their lossesDoesn’t gamble if they’re upset, angry, or depressedNational Council on Problem Gambling – https://www.ncpgambling.org/For help with a gambling problem, call the National Gambling Helpline on 1-800-522-4700 or go to ncpgambling.org/chat