Mariners vs. Rockies Dunkel MLB Picks, Predictions and Prop Bets - Sept. 20

The Seattle Mariners and Colorado Rockies meet on Sunday at 3:10 p.m. ET at Coors Field, attempting to break a 1-1 series tie. Kade Anderson (1-2, 5.33 ERA) gets the start for the Mariners, who are 72-83 this season and third in the AL West. Tomoyuki Sugano (12-10, 5.49 ERA) is expected to start for the Rockies, who are 57-98 and fifth in the NL West.

Despite being on the road the Mariners are a moderate moneyline favorite (-154) over the Rockies (+127). The game's total is set at 10.5.

Mariners vs. Rockies Odds, Game Time

• Game day: Sunday, September 20, 2026
• Game time: 3:10 p.m. ET
• Location: Denver, Colorado
• Stadium: Coors Field
• Favorite: Mariners (-154)
• Underdog: Rockies (+127)
• Over/under: 10.5

How to Watch Mariners vs. Rockies

• TV Channel: COLR and SEAM
• Live Stream: Fubo (Watch for free)

Bet now on FanDuel Sportsbook!

Mariners vs. Rockies: Betting the Moneyline

• The Mariners have gone 59-60 in games they were favored on the moneyline (winning 49.6% of those games).
• Colorado has come away with 55 wins in the 151 contests it has been listed as the underdogs in this season.
• Seattle is 19-18 this season when entering a game favored by -154 or more on the moneyline.
• This season, the Rockies have come away with a win 34 times in 109 chances when named as an underdog of at least +127 or longer on the moneyline.
• The implied moneyline probablility for this matchup gives the Mariners a 60.6% chance to win.
• The Rockies have an implied victory probability of 44.1% according to the moneyline set for this matchup.

Mariners vs. Rockies: Betting the Spread & Total

• In the 155 games in which bookmakers have set an over/under for the Mariners, they have combined with opponents to go over the total 80 times (80-66-9).
• Colorado's games have gone over the total in 75 of its 155 chances.
• The Mariners have a 58-97-0 record ATS this season (covering just 37.4% of the time).
• In 155 games with a line this season, the Rockies have a mark of 81-74-0 against the spread.