Preview the July 3 matchup between the Seattle Mariners and Kansas City Royals with odds over/under, game spread, betting lines and more.

Seattle took game 3 of the series, 3-2, to go up 2-1 over Kansas City with the final meeting on deck. The Royals are in a slump right now with a 2-9 record over the past 11 games compared to the 3-1 record for the Mariners in the last four and 7-4 mark in the previous 11.

The Kansas City Royals (40-47) and the Seattle Mariners (45-41) wrap up a 4-game series Thursday. First pitch from T-Mobile Park is scheduled for 10:10 p.m. ET (MLB.TV Free Game of the Day). Let's analyze BetMGM Sportsbook's MLB odds around the Royals vs. Mariners odds and make our expert MLB picks and predictions for the best bets.