The Texas Rangers, Seattle Mariners, and Houston Astros are trapped in a three-team race for the AL West crown. Heading into this weekend, the Rangers hold a slim half-game lead over the Mariners, and now the two teams will face each other in a pivotal four-game series.Let's dive into the odds and my best bets for tonight's opener.Mariners vs. Rangers Odds, Run Line, and TotalOdds via BetMGM SportsbookRun lineMariners -1.5 (+145)Rangers +1.5 (-175)MoneylineMariners -115Rangers -105TotalOVER 7.5 (-115)UNDER 7.5 (-105)Mariners vs. Rangers Probable PitchersSeattle: Bryce Miller, RHP (4-2, 2.27 ERA)Texas: MacKenzie Gore, LHP (6-8, 4.80 ERA)Mariners vs. Rangers How to WatchDate: Friday, July 24Time: 8:05 p.m. ETVenue: Globe Life FieldHow to Watch (TV): CW33, Mariners.TV Mariners record: 51-52Rangers record: 51-51Mariners vs. Rangers Best MLB Prop BetCal Raleigh OVER 1.5 Strikeouts (+100)Cal Raleigh has struggled when facing left-handed pitchers this season. He has a batting average of just .143 against them and has struck out 32 times in 77 at-bats. He'll face a left-handed pitcher tonight in MacKenzie Gore, who has 7+ strikeouts in three of his last four starts.Mariners vs. Rangers Prediction and Best BetIn today's edition of Betting $100 Every Day for a Year, I made the case for betting on the Rangers as slight home underdogs:The Texas Rangers' offense has been one of the best in the Majors over the past month, ranking seventh in wRC+ in that time frame. The Seattle Mariners' offense is on the opposite end of that spectrum, coming in at 26th in that stat over the same time frame. The Mariners have also been one of the worst teams against lefties this season, and tonight they're on the road against a lefty in MacKenzie Gore.Pick: Rangers -105 via BetMGMFollow Iain on X and InstagramAs a new BetMGM user, you can now claim up to $1,500 in bonus bets when you create an account using BetMGM bonus code SI1500, deposit at least $10, and place a real money wager. If you lose your bet, BetMGM will return your entire stake as bonus bets, up to $1,500. Are you in MI, NJ, PA, or WV? If so, you can bet $10 and receive $150 in bonus bets from BetMGM if you win.Odds refresh periodically and are subject to change.If you or someone you know has a gambling problem and wants help, call 1-800-GAMBLER.You can check out all of Iain's bets here!Add us as a preferred source on GoogleFollow