Royals vs Mariners Prediction 7/3/25 MLB Picks Today

The Kansas City Royals are visiting the Seattle Mariners on Thursday, July 3^rd at the T-Mobile Park in the fourth game of this series, with the Mariners having a 2-1 lead. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Royals vs Mariners Prediction. We will examine:

The Seattle Mariners’ recent form and player performance

The Kansas City Royals’ recent form and player performance

Recent betting trends and streaks involving the Seattle Mariners

Recent betting trends and streaks involving the Kansas City Royals

Recent betting trends in games played between the Kansas City Royals vs Seattle Mariners

A summary that ties it all together and produces a favorable betting outcome for the Kansas City Royals vs Seattle Mariners game

Seattle Mariners Preview

The Seattle Mariners have a 45-41 record this season and are sitting in second place in the AL West. The Mariners have a 22-20 home record and 48-34 in over/under. They are coming off a 3-2 home victory over the Royals, and are 3-1 in their last 4 games. Over is 7-3 in their last 13 games, and they are playing the Yankees and the Pirates next.

The Mariners have a .248 batting average this season, a .324 OBP, and a .404 Slugging percentage. Seattle’s pitching staff has a 3.90 ERA and 1.27 WHIP. Julio Rodriguez leads the Mariners in hits with 90, while Cal Raleigh leads the team both in RBI with 71 and in home runs with 33. J.P. Crawford is the team’s best hitter with a .283 batting average.

Bryan Woo (R) is the projected starting pitcher for the Mariners, and he has a 7-4 record, 2.93 ERA, and 0.97 WHIP.

Kansas City Royals Preview

The Kansas City Royals have a 40-47 record this season and are sitting in 4^th place in the AL Central. The Royals have a 20-23 road record and are 34-52 in over/under. They are coming off a 2-3 road defeat by the Mariners, and are 2-9 in their last 11 games. Under is 8-3 in their last 11 games, and are playing the Diamondbacks and the Pirates next.

The Royals have a .243 batting average this season, a .298 OBP, and a .364 Slugging percentage. Kansas’ pitching staff has a 3.49 ERA and 1.22 WHIP. Bobby Witt Jr. leads the Royals with 99 hits, while Maikel Garcia is the team’s best hitter with a .305 batting average. Salvador Perez leads the team in RBI, with 48.

Seth Lugo (R) is the projected starter for the Royals, and he has a 5-5 record, 2.74 ERA, and 1.08 WHIP.

Why the Seattle Mariners will win

• The Royals have lost 10 of their last 11 night games against American League opponents that held a winning record.
• The Mariners have won seven of their last eight home games against AL Central opponents.
• The Royals have failed to cover the run line in four of their last five games against American League opponents following a loss.
• The Royals have trailed after 5 innings in each of their last five Thursday night games against AL West opponents that held a winning record.

Why the Kansas City Royals will win

• The Royals have won three of their last four games as road underdogs against American League opponents following a loss.
• The Mariners have lost three of their last four games as favorites against the Royals following a win.
• The Royals have covered the run line in each of their last eight games as underdogs following a road loss.
• The Mariners have failed to cover the run line in nine of their last 10 night games against AL Central opponents following a home win.
• The Royals have led after 5 innings in eight of their last nine road games against AL West opponents.
• The Royals have won the first inning in four of their last five games as underdogs against AL West opponents.
• The Royals have led after 3 innings in each of their last seven road night games.

Total Runs Facts

• Five of the last six games between the Royals and Mariners have gone OVER the total runs line.
• Four of the Royals’ last five games as underdogs against the Mariners have gone OVER the total runs line.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in each of the Mariners’ last seven Thursday night games at T-Mobile Park.
• The ‘Inning 1 OVER 0.5 runs’ market has hit in six of the Royals’ last seven road games against American League opponents.

Matchup/League Facts

• The Mariners rank T28th in the league for triples this season (4).
• The Mariners are one of only three teams in the league to rank top 10 in both steals and home runs this season.
• The Royals rank 30th in the league for runs scored this season (287).
• The Royals rank 30th in the league for home runs this season (58).

Royals vs Mariners Prediction

The Mariners are 8-4 in their last 12 overall meetings against the Royals, and are 6-2 in their last 8 meetings in Seattle. Over is 9-3 in their last 12 meetings.

In this Royals vs Mariners Prediction, the Mariners are coming as -160 home favorites. The Mariners have a better overall record, but both teams have almost identical home/away splits. Both starting pitchers have been excellent this season, with a combined 5.67 ERA, and Woo has been better at home and has two shutouts in his last three starts, while Lugo has only two earned runs in 22.5 innings of work across his last four starts. Both teams have top-8 bullpen ERA, and the Royals have the worst offense in the league. Take the under 7.5 runs in this one.