Sunday's 15-game MLB slate gives us plenty of opportunities to attack the moneyline market, with a mix of strong favorites and intriguing underdogs that could help build the bankroll.
Read on for our MLB moneyline predictions and MLB picks for Sunday, Sept. 20.
MLB moneyline picks for September 20
For help understanding Polymarket probabilities, see our odds calculator.
| Matchup | Pick |
|---|---|
 Philliesvs  Mets |
42% |
 Royalsvs  Pirates |
54% |
 Red Soxvs  Rays |
56% |
 Athleticsvs  Guardians |
65% |
 Cubsvs  Reds |
56% |
 Bravesvs  Astros |
54% |
 Tigersvs  White Sox |
48% |
 Nationalsvs  Cardinals |
56% |
 Blue Jaysvs  Rangers |
46% |
 Marinersvs  Rockies |
57% |
 Twinsvs  Angels |
46% |
 Yankeesvs  Diamondbacks |
48% |
 Marlinsvs  Padres |
57% |
 Giantsvs  Dodgers |
71% |
 Brewersvs  Orioles |
64% |
Prices courtesy of Polymarket as of September 20.
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Expert MLB moneyline picks for September 20
Phillies vs Mets: Mets
Mets win probability: 42%
Philadelphia has gone ice cold at the plate over the past two weeks, managing just an 86 wRC+ and .379 SLG. New York brings serious home value behind a shutdown bullpen that boasts a 2.95 SIERA over their past 14 days.
Royals vs Pirates: Pirates
Pirates win probability: 54%
Kansas City's lineup is completely lost right now, hitting an MLB-worst .197 with a punchless 73 wRC+ over their last twelve games. Pittsburgh's pitching staff gets an easy target here, giving the home club a straightforward path to cash.
Red Sox vs Rays: Rays
Rays win probability: 56%
Boston's bats have gone silent lately, scraping together a .203 average and .118 ISO. Tampa Bay holds all the momentum at Tropicana Field with a top-five offense (117 wRC+) and late-inning relievers who limit hard contact to a 3.61 SIERA during the past 14 days.
Athletics vs Guardians: Guardians
Guardians win probability: 65%
The Athletics sit dead last in baseball with an abysmal 68 wRC+ and .262 on-base mark over the fortnight. Cleveland dominates the late innings behind an untouchable bullpen racking up 12.26 strikeouts per nine and a microscopic 2.72 SIERA during that same time span.
Cubs vs Reds: Cubs
Cubs win probability: 56%
Chicago is crushing the baseball over the last 14 days, pairing a 120 wRC+ with an 11.1% walk rate. Cincinnati cannot stop giving away free passes, saddled with a messy 5.17 bullpen walk rate and an ugly 4.69 SIERA over the same period.
Braves vs Astros: Astros
Astros win probability: 54%
Atlanta is stuck in a brutal late-season slump, limping in with an 84 wRC+ and an empty .291 OBP. Houston matches up well at Minute Maid Park behind Hunter Brown and a high-leverage bullpen holding opposing hitters to a .210 average.
Tigers vs White Sox: Tigers
Tigers win probability: 48%
Detroit's lineup has quietly caught fire, crossing the plate 74 times over their last 14 games with a 113 wRC+. Taking the plus-money road dog is an easy call against Chicago, bolstered by Detroit's bullpen crew carrying a stingy 0.88 WHIP.
Nationals vs Cardinals: Cardinals
Cardinals win probability: 56%
Washington's offense remains lifeless at 84 wRC+, but their bullpen is the real liability. The Nationals are walking 6.60 batters per nine with a 5.46 SIERA across the past 14 days, handing St. Louis a massive advantage once the starters leave the mound.
Blue Jays vs Rangers: Blue Jays
Blue Jays win probability: 46%
Toronto's hitters are dialed in, posting the lowest strikeout rate in baseball (16.0%) and a top-three 119 wRC+ over the last fortnight. Grabbing them as road underdogs makes great sense against Texas, backed by steady relief pitching at 3.67 SIERA.
Mariners vs Rockies: Mariners
Mariners win probability: 57%
Seattle's bats are locked in, slugging .428 with a 121 wRC+ over their last dozen contests. That firepower should feast at Coors Field against a disastrous Colorado bullpen that is getting torched for a 7.48 ERA and 1.70 WHIP over their last 14 days.
Twins vs Angels: Angels
Angels win probability: 46%
Minnesota is in a complete freefall offensively, hitting .210 with an anemic 74 wRC+. Los Angeles presents sharp underdog value against a collapsing Twins bullpen that has surrendered an alarming 6.20 ERA and 1.64 WHIP down the stretch.
Yankees vs Diamondbacks: Diamondbacks
Diamondbacks win probability: 48%
Arizona looks great as a home underdog behind a lockdown bullpen dealing with a 2.39 ERA and 3.43 SIERA. New York's relief numbers are a mirage waiting to crack, with an underlying 4.72 SIERA and bloated 5.24 FIP.
Marlins vs Padres: Padres
Padres win probability: 57%
Nobody is swinging hotter bats than San Diego, leading the sport with a .500 slugging mark and 135 wRC+ over the last two weeks. That relentless run production, combined with a rock-solid 3.35 relief SIERA, easily handles Miami at home.
Giants vs Dodgers: Dodgers
Dodgers win probability: 71%
San Francisco's bullpen is a disaster waiting to happen, striking out almost nobody (13.2% K%) and generating an inflated 5.27 SIERA. Los Angeles will expose that weakness with an elite 13.6% walk rate and proven 118 wRC+ offensive punch.
Brewers vs Orioles: Brewers
Brewers win probability: 64%
Milwaukee's offense is an absolute runaway train right now, piling up 87 runs with a .374 on-base percentage over their last twelve games. With young flamethrower Jacob Misiorowski starting, they will overpower a Baltimore lineup that is striking out 30.7% of the time.
Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
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