MLB Betting Promos: Odds & Picks for Saturday, August 8

Today's MLB schedule is built around a national-TV spine, and the best MLB betting promos are open to anyone who registers before the first of those broadcasts.

FS1 leads off with Athletics vs. Red Sox at 4:10 p.m. ET, then FOX owns the 7:15 p.m. ET window with a three-game regional package: Orioles vs. Rangers, Guardians vs. White Sox, and Tigers vs. Giants.

Open accounts across the MLB betting promos listed below that provide north of $3,000 in welcome value from bonus-bet drops, first-bet insurance, and bet-and-get offers, all of which can be aimed at a FOX or FS1 game or anything else on the Saturday board.

Saturday MLB Odds & Picks: One Play for Every Televised Game

Athletics vs. Red Sox (4:10 p.m. ET, FS1) — Pick: Red Sox moneyline

Boston entered the week 10 games over .500 while the Athletics sat more than 20 games under, and the gap between the two rosters widened after Sacramento's deadline. The A's are also managing without full strength in the middle of the order.

Slugger Nick Kurtz was sent to a specialist for his injured right thumb in early August, thinning out the one part of the lineup that gives Boston pitching a reason to work carefully. Lay the price at Fenway rather than reaching for the run line.

Orioles at Rangers (7:15 p.m. ET, FOX) — Pick: Rangers moneyline 

Texas hovered right around .500 entering the weekend and Baltimore did not, which is most of the argument here. The Rangers profile as a run-prevention club rather than a slugging one, so the moneyline is the cleaner side than any total in the low- to mid-8s.

Confirm the probable pitchers before locking this in. Texas has leaned on its rotation to carry games, and a bullpen day would take the value out of the play entirely.

Guardians at White Sox (7:15 p.m. ET, FOX) — Pick: Guardians first five innings

Cleveland's staff has been the best strikeout unit in baseball this season, sitting near a 32% strikeout rate with a SIERA around 3.00, and that edge is concentrated in the starters. Chicago has been a genuinely tough home team, which is why the full-game number is closer than the talent gap suggests.

Buying the first five innings keeps the Guardians' pitching advantage and takes both bullpens out of the equation.

Tigers at Giants (7:15 p.m. ET, FOX) — Pick: Under total runs at Oracle Park

Oracle is the friendliest environment in the National League for an under, and San Francisco's offense has spent the year at or near the bottom of the league in home runs and runs scored. Detroit, meanwhile, moved starting pitching out at the deadline and has been a very different team away from Comerica.

Two lineups short on thump, in a park that swallows fly balls, with an evening marine layer. Take the under and let the bonus ride.

Best MLB Betting Promos for Saturday, August 8

Each offer below has been checked against Saturday's board. Here's what you get, what it costs to trigger, and the code that unlocks it.

1. Fanatics Sportsbook

Fanatics Sportsbook promo code hands new users a $1,000 Bet Match spread over ten consecutive days of betting, which makes it the offer built for volume rather than one big swing. Lose a wager on any given day and Fanatics returns it as FanCash, so the cushion refreshes daily. This is useful throughout a Saturday-into-Sunday weekend of baseball instead of burning out on a single qualifying bet.

2. BetMGM Sportsbook

BetMGM bonus code TOPACTION carries the biggest headline number of today's MLB betting promos: $1,500 of coverage on your opening wager. Take the Red Sox on FS1, a FOX-game total, or anything else on the card. If the bet comes up short, BetMGM returns the stake in bonus bets up to $1,500. The bigger the first bet, the more of that ceiling you actually use.

3. bet365 Sportsbook

There's no bet365 bonus code to type, as the offer attaches itself when you register through the link. The terms are about as simple as MLB betting promos get: put $10 on any Saturday market and $150 in bonus bets follows whether the wager wins or loses. Stick it on the Rangers, the Oracle Park under, or a game nobody's televising; the result doesn't change the payout.

4. DraftKings Sportsbook

The DraftKings promo code requires nothing but the link, and it asks for the smallest buy-in on this page: $5 on any market returns $150 in bonus bets, credited immediately rather than after the game settles. For anyone who just wants bankroll in the account before the 4:10 p.m. ET first pitch on FS1, this is the fastest of Saturday's MLB betting promos to convert.

5. FanDuel Sportsbook

No FanDuel promo code is needed here either, and the structure stretches your coverage across five days instead of one: risk $5 a day, and any losing qualifier comes back as a reset worth up to $200, to a $1,000 total. If your betting habit is a few dollars a night through a weekend series rather than one meaningful Saturday wager, this is the shape that fits.

6. theScore Bet

theScore Bet promo code ACTNEWS unlocks a $1,000 First Bet Reset: back any market on Saturday's card, and a losing opener is refunded in bonus bets up to a grand. The terms change by state, as players in Michigan, New Jersey, Pennsylvania, and West Virginia get a Bet $10, Get $100 bet-and-get instead of the reset, so check which version your account qualifies for.

7. betPARX

betPARX promo code TANBONUS puts 100% insurance behind your first wager, refunded as a bonus bet up to $50. It's the smallest number on this page, but it's also a two-minute signup in three states, which is a low-effort addition if you're already working through the rest of these MLB betting promos.

8. Hard Rock Bet

The Hard Rock Bet promo code is another link-activated offer, and it's the one bet-and-get on this list with a condition attached: your $5 qualifier has to win before the $150 in bonus bets is released. Michigan and New Jersey only, so pick a side you actually like rather than treating the qualifier as a formality.

9. BetRivers

No BetRivers bonus code is required, and what you get depends on where you're registering: a 2nd Chance Bet worth as much as $500 in Michigan and Pennsylvania, scaling down through New Jersey and West Virginia. Lose the opener and it returns as a bonus bet, which keeps you live through the FOX window even if the afternoon game doesn't go your way.

10. Borgata

Borgata bonus code ACTION closes out the sportsbook list with a New Jersey-only deal: $20 down, $100 in bonus bets back as soon as the qualifier settles. No win requirement and no waiting period beyond settlement, which makes it a tidy last stop for Garden State bettors stacking Saturday's offers.

MLB Prediction Markets for Today's Slate

Sportsbooks aren't the only route into Saturday's baseball. Prediction market apps run welcome offers of their own, and their state coverage dwarfs the licensed books. This is worth knowing if you're reading this from somewhere the sportsbook MLB betting promos above don't reach.

1. Kalshi

Kalshi promo code ACTION pays new traders a bonus of up to $500 once they've traded $25. Kalshi is live in better than 40 states, which puts today's FOX and FS1 games within reach for plenty of people who can't legally open a sportsbook account.

2. Polymarket

Polymarket promo codeACTION is the smaller of the two and the quicker to clear: deposit $10, collect a $20 trading bonus. Coverage again runs past 40 states, so it slots neatly alongside Kalshi at the end of your stack for MLB picks.