The relievers allowed a collective six earned runs on nine hits in 14 innings pitched across the four-game series.The relievers have had to put in extra work several times over the club's current stretch due to short outings from the starting rotation.

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.

The Kansas City Royals take on the Seattle Mariners tonight in the third installment of this year’s Battle for Grass Creek. They split the first two games with the winning team plating six in each of them. A victory tonight would secure at least a split in this rare four-game series.