The Chicago Cubs have been playing some excellent baseball throughout the 2025 MLB regular season and it is starting to be reflected in the standings. Their lea

The Seattle Mariners (37-36) and Chicago Cubs (45-29) begin a 3-game series Friday. First pitch from Wrigley Field in Chicago is set for 2:20 p.m. ET (MLB Network). Let's analyze BetMGM Sportsbook's MLB odds around the Mariners vs. Cubs odds and make our expert MLB picks and predictions for the best bets.

Preview the June 21 matchup between the Chicago Cubs and Seattle Mariners with odds over/under, game spread, betting lines and more.

Legendary Cubs slugger Sammy Sosa returned to Wrigley Field for the first time in more than 20 years before Chicago’s game with the Seattle Mariners

Famed slugger Sammy Sosa made his long-anticipated return to Wrigley Field on Saturday -- his first official appearance at the stadium in 21 years -- for the Chicago Cubs ' home contest against the Seattle Mariners (SEA-CHC GameTracker ).

Raleigh homers twice, breaks Bench’s record in the Mariners’ victory over the Cubs CHICAGO — Cal Raleigh broke Johnny Bench’s record for home runs by a catcher before the All-Star break, hitting his major league-leading 28th and 29th in the Seattle Mariners’ 9-4 victory over the Chicago Cubs on Friday.

MLB player prop bets and odds for Cal Raleigh on Saturday, June 21, 2025, as the Seattle Mariners take on the Chicago Cubs.

After the 40,787 in attendance got a chance to honor Sosa before the bottom of the second inning, they watched the player who is so far the best home run hitter of 2025, the Mariners’ Cal Raleigh, club two more dingers to lead the Mariners to a come-from-behind 9-4 win over the Cubs.