The Seattle Mariners and Texas Rangers face off in a three-game series starting on September 15. According to BetMGM, the Mariners are favored to win the first game with a moneyline of -135, while the Rangers have a moneyline of +115. The over/under for runs scored is set at 8.5. In their last 10 games, the Mariners have won seven and the Rangers have won three. Experts predict the Mariners will take the first game due to their recent strong performance.