MLB NRFI & YRFI Picks Today: One Side Beats Fair On Monday's Board — The Red Sox-Blue Jays YRFI (August 10)
Monday, August 10 hands the OddsShopper first-inning odds screen a 10-game MLB card, 20 NRFI and YRFI sides, and the tightest read this column has printed in a while: exactly one side pays better than its fair, no-vig price. On a board this sealed, the interesting question stops being "which picks" and becomes "why did the one seam open where it did" — and the answer runs through a market whose two best prices sum to less than 100%, which I'll open up piece by piece below. If the bet type itself is new to you, start with the what is NRFI explainer and come back.
The Quick Answer
One first-inning side beats its fair (no-vig) price on Monday, August 10: the Boston Red Sox vs. Toronto Blue Jays YRFI at +120, against a true price of +113, a +3.3% edge. The other 19 sides all price at or below fair. The closest miss is the Milwaukee Brewers vs. San Diego Padres YRFI at +124 against a true +124, a -0.1% edge that amounts to the fair price and nothing more. The full 20-side board, the sub-100% math inside the Red Sox-Blue Jays market, and what +3.3% actually pays in dollars are all below.
Monday's First-Inning Board: All 20 Sides, Ranked
The frame first, because it decides how you read every row. A positive edge means the best takeable price pays more than the true, no-vig probability says it should. That's value. A negative edge means the price is shorter than fair, and the market is efficient there: no play, whatever the pitching matchup suggests. Here is the whole 10-game card, best side to worst:
| Game (Listed First Pitch) | Side | Best takeable | Fair (no-vig) | Edge |
|---|---|---|---|---|
| Red Sox Vs. Blue Jays (6:07 PM) | YRFI | +120 | +113 | +3.3% |
| Brewers Vs. Padres (8:40 PM) | YRFI | +124 | +124 | -0.1% |
| Rockies Vs. Diamondbacks (8:40 PM) | NRFI | -104 | -102 | -0.7% |
| Red Sox Vs. Blue Jays (6:07 PM) | NRFI | -115 | -113 | -0.8% |
| Royals Vs. Dodgers (9:10 PM) | NRFI | -118 | -116 | -0.8% |
| Rays Vs. Athletics (8:40 PM) | NRFI | +120 | +123 | -1.4% |
| Astros Vs. Giants (8:45 PM) | NRFI | -104 | -100 | -1.9% |
| Rangers Vs. Angels (8:38 PM) | NRFI | -114 | -109 | -1.9% |
| Brewers Vs. Padres (8:40 PM) | NRFI | -130 | -124 | -2.0% |
| Rangers Vs. Angels (8:38 PM) | YRFI | +105 | +109 | -2.1% |
| Rays Vs. Athletics (8:40 PM) | YRFI | -130 | -123 | -2.3% |
| Astros Vs. Giants (8:45 PM) | YRFI | -105 | +100 | -2.4% |
| Royals Vs. Dodgers (9:10 PM) | YRFI | +110 | +116 | -2.7% |
| Phillies Vs. Cardinals (6:45 PM) | NRFI | +110 | +116 | -2.8% |
| Mets Vs. Braves (6:15 PM) | YRFI | -104 | +102 | -3.0% |
| Orioles Vs. Twins (6:40 PM) | NRFI | -112 | -104 | -3.3% |
| Phillies Vs. Cardinals (6:45 PM) | YRFI | -125 | -116 | -3.3% |
| Rockies Vs. Diamondbacks (8:40 PM) | YRFI | -105 | +102 | -3.6% |
| Mets Vs. Braves (6:15 PM) | NRFI | -111 | -102 | -3.9% |
| Orioles Vs. Twins (6:40 PM) | YRFI | -104 | +104 | -4.0% |
The row worth staring at is the first one, and not only because it's the lone positive number. The Red Sox-Blue Jays YRFI pays +120 against a true +113, and the NRFI on the very same game sits three rows down at -115 against a true -113. One market, one half above fair, one half below it. That asymmetry is the day's entire story, and it starts with a number a two-way market isn't supposed to print.
The Red Sox-Blue Jays Market Prices Under 100% — But Only One Half Is Mispriced
Convert the two best takeable prices to implied probability and add them: -115 is 53.5%, +120 is 45.5%, and the sum is roughly 98.9%. A two-way market quoting less than 100% across books is the textbook shape of an arbitrage window. Stake about $54 on the NRFI at -115 and $46 on the YRFI at +120 and either result returns roughly $101 on the $100 staked — about a point of theoretical margin, if every fill lands. The honest caveats before anyone treats that as an outcome: a window like this rarely survives long once lineups post, a fill at a worse price erases it, it requires funded accounts at the right books with both quotes still standing, and books cut limits on accounts that do this repeatedly. Scanning ten games by hand for one is also exactly the tedium the OddsShopper Arbitrage tool automates; it watches every two-way market for prices that sum under 100% continuously.
Here's the part that separates Monday's window from the shape you'd expect: it is not built from two good prices. Run the devig and the NRFI half actually grades negative: -115 is a worse price than its fair -113, a -0.8% edge on its own. The whole gap lives on the other side, where +120 clears the true +113 by +3.3%. In other words, the arbitrage exists because one book hung a YRFI price generous enough to subsidize the entire pair. When a market cracks, the value usually pools on one half, and today it pooled entirely on the run-scores side of the 6:07 PM opener in the Red Sox-Blue Jays market.
The Other 19 Sides Price Like A Market That Wants No Action
That pooling pattern is confirmed by where every other row lands. Run the same combined-implied math across all ten games: Red Sox-Blue Jays is the day's only sub-100% market at 98.9%, Brewers-Padres is the second-cheapest at about 101.2%, and it holds the board's second-best side, the YRFI at +124 against a true +124, a -0.1% edge that is the fair price, free, and nothing more. From there the tolls climb: most of the card sits between roughly 101.7% and 103.2%, and the two most expensive markets on the day, Mets-Braves at about 103.6% and Orioles-Twins at about 103.8%, bury everything they touch, including the board's worst row, the Orioles-Twins YRFI at -104 against a true +104, a -4.0% edge. Cheap markets are where mispricings can survive; expensive ones swallow them before you ever see one. Sunday's edition proved the extreme version of that rule, when not one of its 30 first-inning sides cleared fair. Monday is that same sealed board with exactly one seam, and the seam sits precisely where the toll is lowest.
Worth saying plainly: a -0.1% edge is not a pick, and neither is a -0.7%. Nineteen of Monday's 20 rows are the market telling you no. The board's case rests entirely on the +120, so let's put actual dollars on it.
Worked Example: What +3.3% At +120 Actually Pays
Take the Red Sox-Blue Jays YRFI and run the two steps the first-inning odds screen runs continuously:
- Best takeable YRFI +120 → a winning $1 risk returns $2.20 (stake included)
- Fair (no-vig) +113 → the market's honest estimate of a first-inning run in this game is 46.9% (100 ÷ 213)
Multiply the $2.20 return by the 46.9% true chance: roughly $1.03 back per dollar risked, the +3.3% the board prints on the unrounded true price. Now run the identical steps on the board's bottom row, the Orioles-Twins YRFI: -104 returns $1.96 per dollar, the fair +104 implies 49.0%, and 1.96 × 0.490 gets back roughly 96 cents per dollar, the printed -4.0%. Two YRFIs, about a half-hour apart on the schedule, and the difference between earning three cents on the dollar and burning four is nothing but the price. Neither lineup's bats entered that calculation. That's the whole argument for pricing first innings off the number instead of the narrative, and our how to find +EV bets guide walks the full method.
For the full-game side of Monday's ten, the live odds screen — shop the number across every major book runs the same fair-price test on moneylines and totals. Holding a free bet from a book promo with no first-inning price you like? The free bet converter shows how to turn it into withdrawable cash instead of a forced play. And for a human card next to the math, browse the free expert picks today.
New to OddsShopper? It lines up every major sportsbook's NRFI and YRFI price, devigs each market to its true (no-vig) number, and flags any side paying more than its fair chance: the exact test this article just ran 20 times, done across every book in seconds. Code NRFI takes 20% off OddsShopper Pro.
A Few Realities Before You Bet A YRFI
- A 3.3% Edge Is A Good Number, Not A Guarantee. The Red Sox-Blue Jays YRFI at +120 still loses more often than it wins; a 46.9% true chance means the scoreless first is the slightly likelier outcome. Edges this size pay across dozens of disciplined spots, never as a promise about one Monday night.
- The Sample Is One Half-Inning Per Team. The whole bet resolves on six outs or fewer. An edge column is a long-run statement; any single game is allowed to ignore it completely.
- Lineups And Weather Move These Numbers. These prices are as of this writing, and a market quoting 98.9% combined is precisely the kind that gets repaired fast. Recheck the screen inside each game's pregame window, from the 6:07 PM opener to the 9:10 PM finale.
- Play Responsibly. Sports betting is for adults 21+ in regulated markets where it is legal. Even a positive-edge price loses often; bet within your means and never chase losses.
FAQ
What does NRFI mean in betting? NRFI stands for No Runs First Inning, a yes/no bet that neither team scores in the first inning, both halves combined. If either team plates a run in the first, NRFI loses and YRFI (Yes Runs First Inning) wins. Nothing after the first inning counts. On Monday's card the 10 NRFI prices run from -130 (Brewers-Padres) to +120 (Rays-Athletics), and not one of the 10 beats its fair number, which is the whole reason the edge column, not the definition, does the picking. The MLB betting terms glossary covers the rest of the vocabulary.
What are the best NRFI picks today? On Monday, August 10, there are none by the math: all 10 NRFI sides price at or below their fair number, with the closest being the Rockies-Diamondbacks NRFI at -104 against a true -102 (-0.7%). The board's only positive first-inning side is a YRFI: Red Sox-Blue Jays over 0.5 first-inning runs at +120 against a true +113, a +3.3% edge.
How can a market price under 100% while one of its sides is still below fair? Because "best takeable" means the best price at different books, and the mispricing isn't split evenly. In the Red Sox-Blue Jays market, one book's +120 on the YRFI is generous enough that the two implied probabilities sum to about 98.9%, even though the best NRFI price, -115, is itself a shade worse than the fair -113. The devig shows the entire gap lives on the YRFI half; the arbitrage window exists because of that one price, not because both sides are good.
Why does the edge column go negative on almost every game? Because most first-inning markets price efficiently most days. On Monday, 19 of the 20 sides cost as much as or more than their fair number, and every market on the card except Red Sox-Blue Jays holds between roughly 101.2% and 103.8% of combined implied probability. A negative edge isn't a lean toward the other side; it's the board telling you no price in that market beats fair, so the play is no play.
Bottom Line
Monday, August 10 is a sealed board with one seam. Of its 20 first-inning sides, 19 price at or below fair, the tolls run as high as 103.8% in Orioles-Twins, and the single exception, the Red Sox-Blue Jays YRFI at +120 against a true +113, sits inside the day's only sub-100% market, where one generous price carries both the +3.3% edge and a theoretical point of arbitrage margin on its back. Sunday's board showed what this market looks like with zero seams; Monday shows that when one finally opens, it opens in the cheapest market on the card. Find the cheap market first, then ask which half is mispriced. The screen runs that order of operations for you every morning.
Read tonight's first-inning board the right way. OddsShopper lines up every book's NRFI and YRFI price on the first-inning odds screen and flags any side that beats its true odds the moment one appears. Code NRFI takes 20% off OddsShopper Pro. Bet responsibly, 21+ where legal.
