2021 Mariners Win Total Bet Over/Under: How Many Games Will Seattle Win?

Last Updated: Mar 29, 2021

Here’s our report on 2021 Mariners Win Total Bet: How Many Games Seattle Will Win, complete with a 2021 Mariners Wins Over/Under. The Game Day takes a dive into offseason acquisitions and losses to determine potentially profitable win total betting odds.

  • Mariners Win Total Over/Under odds and lines courtesy of BetMGM current as of 3/2/2021 at 11:30 p.m. ET.
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  • Read our full 2021 MLB Preseason Betting Guide for tips, predictions and picks.

2021 Mariners Win Total Bet: How Many Games Will Seattle Win?

2021 Mariners Wins Over/Under

  • Over 72.5 wins (-105)
  • Under 72.5 wins (-115)

The Mariners had planned to make the 2020 season a heavily developmental one, but the shortening of the campaign by 102 games and the elimination of the minor-league season altogether naturally put a crimp in those plans. However, Seattle still got several young pieces valuable playing time and ended up with a better-than-expected 27-33 record that included a 14-10 home mark.

Naturally, there’s plenty of holes that can be poked in whatever improvements Seattle demonstrated, including the fact they played a limited number of opponents they got to scout increasingly well and only had to work within a 60-game sample overall. But there’s no denying Scott Servais’ squad has some solid young talent that’s better for having gotten playing time last season, and that the team made some key additions that could well pay dividends in 2021.

Count Evan White, Dylan Moore, Ty France and Kyle Lewis as talents that head into the new season with varying levels of high expectations after gaining valuable experience in 2020.

White produced a ragged .176/.252/.346 line, but he did get his first 202 big-league plate appearances under his belt and laced 15 (seven doubles, eight home runs) of his 32 hits for extra bases. Moore was a revelation, as the valued utility player proved plenty capable at the plate with a .255/.358/.496 slash with 17 extra-base hits (nine doubles, eight home runs) and 12 stolen bases in 38 games.

France arrived via trade with the Padres at the deadline and was excellent with a .309/.371/.469 line, five doubles, a triple, two home runs and 13 RBI across 89 plate appearances in Seattle, and he’ll start the season as the full-time designated hitter. And finally, Lewis enjoyed the biggest breakout of them all, slugging 11 home runs and driving in 28 runs as part of a .262/.364/.437 slash. The sky is believed the be the limit for the 25-year-old outfielder, and what he might be able to accomplish over a full season will be one of the more intriguing aspects of the ’21 Mariners to track.

Notably, there are three additions to the 2021 roster that could also be key, although only one arrived this offseason.

James Paxton returns to Seattle after two seasons in New York, and he’s penciled into the No. 2 role in the starting rotation. Back and forearm injuries were Paxton’s undoing during his second and final Yankees campaign, but he’s reportedly back to full health as spring training begins. If he’s able to come close to the pitcher who posted three straight double-digit win seasons from 2017-19 – two of those with the Mariners – he’ll give a serious boost to a rotation that already features several other formidable lefties in Marco Gonzales, Yusei Kikuchi and Justus Sheffield.

The two additional “newcomers” are actually holdovers that missed the 2020 season altogether — Tom Murphy and Mitch Haniger.

Murphy’s season was lost due to a fractured foot, but the veteran backstop had enjoyed a career-best 2019 at the plate with a .273/.324/.535 line, 37 extra-base hits (12 doubles, one triple, 18 home runs) and 40 RBI across 281 plate appearances. He’s fully healed and will split playing time behind the dish with Luis Torrens, who showed plenty of promise himself after arriving from San Diego at the trade deadline last season.

Meanwhile, Haniger appears to finally be ready for game action again after last playing in June 2019. The veteran outfielder appears to be over the avalanche of injuries that have kept him sidelined the last 21 months and is already looking good in spring training and early Cactus League games.

Haniger was a star in the making during the 2018 and 2019 seasons when he posted a combined .284/.361/.492 line with 63 doubles, six triples, 42 home runs and 140 RBI across 253 games in that span. If the Mariners have the old Haniger back, the potency of a lineup that already includes Murphy, Lewis, France, Moore and J.P. Crawford goes up that much more.

One final new piece to factor in is Rafael Montero, who went 8-for-8 in save opportunities with the Rangers last season and boasts a mid-90s fastball. If the right-hander carries that momentum over into his new team and the new season, Seattle will have a reliable ninth-inning option to hopefully convert a fair share of leads into victories.

2021 Mariners Win Total Wager: Over 72.5 wins (-105)

The Mariners could sneak up on quite a few teams this season, given their collection of sneaky-good talent and a rotation that could outperform expectations, especially if Kikuchi continues to build on some of the promising underlying metrics he produced last season.

As with any team, good health will be key, but it’s worth noting Seattle also has an elite prospect waiting in the wings that will see his first big-league action at some point this season in Jarred Kelenic.

While this club needs another year or two to contend at the highest levels of the American League, I see 2021 as an important transitional season where significant strides will be made. As such, I like the Mariners to at least narrowly get over the 73-win mark.

⚾ After you finish reading “2021 Mariners Win Total Bet Over/Under” and decide on your Mariners wagers, place a bet on MLB futures at any of our preferred sportsbooks. ⚾


Juan Carlos Blanco

Juan Carlos Blanco has been playing fantasy sports since 1997 and actively writing about the fantasy sports and sports betting industries since 2015 for multiple websites. He has covered a wide variety of professional sports leagues, including the NFL, MLB, NBA, CFL, Arena Football League, Alliance of American Football, XFL, NPB and KBO. He was the recipient of the FSWA's 2016 Newcomer of the Year award for his work with RotoWire.

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