👉 TAP TO SAVE 30% WITH CODE NEW
X
Lost password?

Don't have an account?
Gain Access Now

X

Receive free daily analysis

NFL
NBA
NHL
NASCAR
CFB
MLB
MMA
PGA
ESPORTS
BETTING

Already have an account? Log In

X

Forgot Password


POPULAR FANTASY TOOLS

Expert Advice
Articles & Tools
Import Your Leagues
Draft Rankings
Draft Simulator
Enter League Settings
Compare Any Players
Rookies & Call-Ups
24x7 News and Alerts

Top MLB Betting Picks for Today's Slate (5/21/19)

Nate Duffett's MLB betting picks for 5/21/19. He analyzes Vegas lines and recommends the top expert bets for today's MLB slate including moneylines and over/unders.

Welcome back RotoBallers! On Tuesday, May 21st, we see a huge 15 game MLB slate. The day starts with a 6:10 PM game between the Oakland Athletics and Cleveland Indians, and ends with a 10:10 PM game between the Arizona Diamondbacks and San Diego Padres.

In this article, we will dive into the numbers and pick out my top recommended betting picks for today's slate. Feel free to hit me up on Twitter @Roto_Nate if you have any questions.

So without any further delay, below are my picks for Tuesday, May 21st. Good luck!

Featured Promo: New Novig users get a $25 purchase match (50% discount up to $25) on your first Novig deposit, and 6 free months of RotoBaller's "Big-4" Premium Pass (NFL, NBA, MLB, NHL) which includes exclusive tools for Betting, Props, DFS and more! CLAIM IT NOW

 

Boston Red Sox (-150) @ Toronto Blue Jays | O/U: 9

We see a considerable change in the odds from yesterday's game, as the Red Sox drop to only -150 favorites against the Blue Jays. This is due in part to Marcus Stroman's 2.95 ERA and Ace status in the Blue Jays rotation. I will look to the numbers to see that this could be a bit of mispricing, as the Blue Jays have been 2-8 straight up when Stroman starts the game.

These results make Stroman the fifth-least profitable pitcher in the Majors. When it comes to recent form, the Blue Jays have only managed four wins over their last 10 games, while the Red Sox have been hot with seven wins in their last 10. Oddly enough, the Blue Jays have also struggled at the Rogers Centre this season, coming in with an abysmal 6-15 record.

My Picks: Red Sox (-150)

 

Cincinnati Reds @ Milwaukee Brewers (-135) | O/U: 8.5

We have another mispricing here in this game with the Brewers coming in at -135 favorites against the Cincinnati Reds. For starters, the Brewers have Gio Gonzalez taking the mound with his 2-0 record and 1.69 ERA, while the Reds counter with Sonny Gray and his 0-4 record and 4.30 ERA.

The Brewers have played their best baseball at home, boasting a 16-7 record, while the Reds have struggled outside of Cincinnati, putting up a 9-15 record. There isn't much else to say here except lock in the Brewers while these odds still exist.

My Picks: Brewers (-135), Brewers -1.5 

 

Colorado Rockies (-116) @ Pittsburgh Pirates | O/U: 7.5

This number seems too good to be true in this matchup. German Marquez has struggled in his last two starts on the road, allowing nine runs over 13 innings. Chris Archer has been a shell of his former self, allowing six earned runs in each of his last two starts, and failing to make it past the fourth inning in either outing.

Rockies games have gone over in seven of the last ten games, while the Pirates have gone over in four of their last five. This total number could hit before the starters even come out of the game, so I will be locking in the Over. Both teams have team totals of 3.5, so I would be interested in sprinkling a bit of cash on both of these numbers as well considering the struggles that each starting pitcher have had in the past month.

My Picks:  Over 7.5, Rockies Team Total O3.5, Pirates Team Total O3.5

 

Miami Marlins @ Detroit Tigers (-107) | O/U: 7.5

There's nothing I hate more than betting the under and rooting for a pitching duel, so if you see me picking an under, you should know that the numbers are there to back it up. Betting the under on a 7.5 total is one of the worst feelings ever, but you have to consider it when two of the worst offences in baseball face off. Spencer Turnbull has had some outstanding outings against teams that are a lot better than the Marlins, so I can't see them getting much off of him in this matchup.

The Marlins will send their best starter, Caleb Smith, who hasn't given up more than 2 earned runs since early April. The Tigers have scored 11 runs in their last five games, while the Marlins have only managed 13 in their last five, with eight of those runs coming in one outlier of a game against the Mets. This could be a snoozefest of a game unless you like watching hitters fail, so my suggestion is to lock in this bet and check the score when it's over.

My Pick: Under 7.5

 

Arizona Diamondbacks @ San Diego Padres (-107) | O/U: 7

The oddsmakers have this game billed as a toss-up which is understandable since both of these teams have been struggling with identical 3-7 records in their last 10 games. The thing that stands out to me is that the Diamondbacks 14-10 away from home while the Padres are 11-14 at Petco Park.

Zack Greinke takes the hill for the Diamondbacks, and he has been dealing in his past six starts, allowing one or fewer runs in all except for a three-run game at Coors Field. Meanwhile, Matt Strahm has been doing good as well allowing two runs in each of his last four starts, but I will take the more experienced Greinke here who will be determined to get his team back on the winning track.

My Pick: Diamondbacks (-101)

More Fantasy Baseball Analysis




POPULAR FANTASY TOOLS

Expert Advice
Articles & Tools
Import Your Leagues
Draft Rankings
Draft Simulator
Enter League Settings
Compare Any Players
Rookies & Call-Ups
24x7 News and Alerts

REAL-TIME FANTASY NEWS

NFL

Is Travis Hunter Now an IDP-Only Asset?
Blake Corum

Does Blake Corum Have Standalone Flex Value?
Mo Alie-Cox

Re-Signing with Colts
Jaxson Dart

to Benefit from Improved Weaponry in Year 2
Darnell Mooney

Signing with Giants on One-Year Deal
Zach Neto

is Removed After Suffering Hand Injury
TB

Nicholas Paul Rejoins Lightning Lineup
Cole Caufield

Cleared to Play Saturday
Alex Tuch

Set to Return Saturday
Bobby Brink

Remains Out Saturday
J.T. Miller

Returns to Action Saturday
Joe Ryan

Won't Pitch in the World Baseball Classic
Courtland Sutton

Will Courtland Sutton Lose Targets to Younger Teammates?
Rashee Rice

Looking to Return to Rookie Form?
Omarion Hampton

Has High Upside with New Offensive Coordinator
Trey Lance

Returns to the Chargers on a One-Year Deal
A.J. Brown

Rams Out on A.J. Brown, Trade to Patriots Likely?
Calvin Ridley

Restructures Deal with Titans
Jonathan Taylor

Is Jonathan Taylor Being Undervalued in Dynasty?
Tony Pollard

Can Tony Pollard Keep the RB1 Spot for Titans?
David Montgomery

Has Contract Updated by Texans
Zack Wheeler

Throws First Live BP Session on Saturday
Chris Godwin Jr.

Can Chris Godwin Jr. be the Buccaneers' WR1?
LeQuint Allen Jr.

Can LeQuint Allen Jr. Emerge as the Primary Receiving Back in Jacksonville?
Isaiah Davis

Appears Buried on the Jets Running Back Depth Chart
Merrill Kelly

Expected to Open Season on the Injured List
Christian Kirk

Dynasty Value is Fading Heading into 2026
Anthony Richardson Sr.

Packers Interested in Acquiring Anthony Richardson Sr.?
Kevin Gausman

Named Toronto's Opening Day Starter
Oronde Gadsden

Has High-End Dynasty Upside After Promising Rookie Year
Kyle Stowers

Back in Grapefruit League Lineup
Jerome Ford

Commanders Agree With Jerome Ford on One-Year Deal
Kevin Porter Jr.

Questionable Against Hawks
Devin Carter

Out Saturday Against Clippers
Russell Westbrook

Set to Return Against Clippers
Derrick White

Expected to Play Saturday Against Wizards
Michael Porter Jr.

Likely to Miss Second Straight Game
Nicolas Claxton

to Rest Saturday Against Philadelphia
Ace Bailey

Leaves Friday's Game Early with Concussion
Radko Gudas

Handed a Five-Game Suspension
Auston Matthews

to Miss Rest of Season
Emil Heineman

Scores Twice Against the Kings
Joel Hofer

Shuts Down the Oilers
Giannis Antetokounmpo

Could Miss Saturday's Game Vs. Hawks
Keegan Murray

to Be Re-Evaluated in Two Weeks
Aaron Gordon

Expected Back Saturday Vs. Lakers
Jamal Murray

Expected to Suit Up Saturday
Collin Sexton

to Miss Third Straight Game
Jalen Smith

is Ruled Out for Friday's Game
Robert Williams III

is Unavailable for Friday's Contest
Draymond Green

is Downgraded to Out on Friday
De'Anthony Melton

to Play on Friday
Ayo Dosunmu

is Cleared for Friday's Game
Anthony Edwards

is Available on Friday
Norman Powell

is Tagged as Questionable for Saturday
Victor Wembanyama

Questionable Saturday Vs. Hornets
Andrew Wiggins

to Miss Fifth Straight Game
Francisco Lindor

Takes Full Batting Practice on Friday
Brandon Woodruff

Still TBD for Opening Day
Trevor Rogers

to Start on Opening Day for Orioles
Kevin Vallejos

Looks To Remain Undefeated In The UFC
Josh Emmett

In Dire Need Of Victory
Gillian Robertson

A Favorite At UFC Vegas 114
Amanda Lemos

Set For Co-Main Event
Oumar Sy

Looks To Win Back-To-Back Fights
Ion Cutelaba

Looks To Get Back In The Win Column
Nathan MacKinnon

Racks Up Four Points in Victory Over Kraken
Alexis Lafrenière

Alexis Lafreniere Stays Hot in Winnipeg
Semyon Varlamov

Won't Return This Season
Alexander Romanov

Could Return for Playoffs
Declan Carlile

Hurt on Thursday Night
Wyatt Kaiser

Sustains Upper-Body Injury Thursday
Erik Gudbranson

Could Be an Option Saturday
Auston Matthews

Exits Game With Injury
Jimmy Snuggerud

Scores Twice Versus Carolina
Michael Misa

Delivers Multi-Point Performance on Thursday
Blake Snell

Around Six Weeks From Being Fully Built Up
Bobby Brink

a Game-Time Decision for Meeting with Flyers
Evander Kane

Available Against Predators
Zack Wheeler

to Face Hitters in Live Batting Practice on Saturday
Gerrit Cole

Could Pitch in a Spring Game Next Week
Matthew Boyd

Named the Cubs' Opening Day Starter
Francisco Lindor

Remains on Schedule for Opening Day
Bryce Miller

Shuts Down Bullpen Due to More Oblique Discomfort
Zac Gallen

Named Arizona's Opening Day Starter
Kyle Teel

Could Miss 4-6 Weeks With Hamstring Strain
Hideki Matsuyama

Brings Strong Course History to TPC Sawgrass
Josh Hader

to Start the Year on the Injured List
Adam Scott

in Strong Form Ahead of The Players
Kyle Teel

Exits Tuesday's Game With Hamstring Injury
Rickie Fowler

on Quite the Run Heading to TPC Sawgrass
Sepp Straka

Needs to Forget What Happened Sunday at Bay Hill
Jordan Spieth

an Enigma Heading to The Players Championship
Justin Rose

Trying to Pick Up the Pieces in Florida
Maverick McNealy

Bounces Back at Arnold Palmer Invitational
Brooks Koepka

Continues His Florida Swing With Some Momentum
Nicolai Hojgaard

in Strong Form Ahead of The Players
Robert MacIntyre

a Volatile Option at The Players
Matt Fitzpatrick

Looks to Return to Top Form at The Players
Sam Burns

a High-Risk, High-Reward Option at The Players
Keegan Bradley

Hard to Trust at The Players
Xander Schauffele

Rounding into Form Heading to Players Championship
Rory McIlroy

Set to Return at Players Championship to Defend Title
Jake Knapp

Set to Return at Players Championship
Viktor Hovland

Continues Strong Start to 2026 Season
Rasmus Hojgaard

Looking for Bounce-Back at Players Championship
Tommy Fleetwood

Will Need to Find Putter to Compete at Players Championship
Akshay Bhatia

Continues Improving Heading to Players Championship
Merrill Kelly

Set to Make Spring Training Debut on Friday
Francisco Lindor

"100 Percent Optimistic" he Can be Ready for Opening Day
Justin Thomas

Continues Competitive Return at The Players Championship
Max Holloway

Drops Decision At UFC 326
Charles Oliveira

Becomes The New BMF Champion
Caio Borralho

Bounces Back
Reinier de Ridder

Reinier De Ridder Loses Back-To-Back Fights
Rob Font

Gets Dominated
Raul Rosas Jr.

Extends His Win Streak
Michael Johnson

Suffers Second-Round Knockout Loss
Drew Dober

Knocks Out Michael Johnson
Ryan Blaney

Earns his Second Consecutive Phoenix Cup Series Win
Christopher Bell

Falls Short of Victory Despite Dominating at Phoenix
Kyle Larson

Earns Hard-Fought Finish of Third at Phoenix
Denny Hamlin

Quietly Gains Another Top-Five Finish at Phoenix
Joey Logano

Crashes out at Phoenix Despite Strong Run
RANKINGS
C
1B
2B
3B
SS
OF
SP
RP

RANKINGS

QB
RB
WR
TE
K
DEF