Best NRFI/YRFI Bets for July 1: Diamondbacks, Giants Poised for Early Runs in NL West Clash

Looking for early betting value in MLB? Here are the best NRFI/YRFI picks for July 1, including Giants vs. Diamondbacks.

As July opens with a modest MLB slate, betting the Yes Run First Inning (YRFI) and No Run First Inning (NRFI) markets offers a unique edge, especially when pitching mismatches and top-heavy lineups come into play.

Tuesday, July 1 , features two intriguing matchups for bettors targeting early scoring. The NL West clash between the San Francisco Giants and Arizona Diamondbacks is a clear candidate for first-inning fireworks, while Brewers-Mets presents sneaky YRFI value despite elite ERA numbers on the mound.

Here’s a breakdown of our two favorite NRFI/YRFI bets for Tuesday’s MLB action.

Giants at Diamondbacks: YRFI (-114)

Time: 9:40 p.m. ET
Where to Watch: NBC Sports California, DBacks TV

There’s nothing sneaky about this one — it’s the most obvious YRFI spot on the board.

• The Diamondbacks score in the first inning more than any other team in baseball, posting a 35.7% first-inning run rate.

• They also rank third in MLB in OPS (.776) and continue to hit well at home in Chase Field’s hitter-friendly confines.

• On the mound for San Francisco is Hayden Birdsong, a promising young arm who has struggled in the starting role. He owns a 5.40 ERA and 1.44 WHIP in seven starts and has been significantly better out of the bullpen.

• Birdsong now faces a surging Arizona lineup that can jump on pitchers early.

• Zac Gallen starts for Arizona, but don’t expect a clean opening frame from him either. Gallen has a 5.75 ERA overall, and an even uglier 6.97 ERA over his last 10 appearances. His command and velocity have both declined in recent outings.

• The Giants recently added Rafael Devers and bring a top-heavy lineup that’s far more dangerous in the opening innings.

The downfall of Zac Gallen needs to be studied pic.twitter.com/qEDHgSXosN

— Lily (@LilyWinsBets) June 25, 2025

Bet: YRFI (-114)

Brewers at Mets: YRFI (+108)

Time: 7:10 p.m. ET
Where to Watch: SNY (Mets), FanDuel Sports Network Wisconsin (Brewers)

At first glance, this matchup screams NRFI — both starters have sub-3.00 ERAs, and the Brewers rank 27th in first-inning scoring rate. But look deeper.

• Milwaukee’s Freddy Peralta has been solid, but his expected ERA (xERA) sits at 3.74, suggesting regression is coming.

• The Mets start Clay Holmes, who also owns a shiny ERA but a concerning 4.12 xERA, and his barrel rate allowed remains high.

• The Brewers are a top-five offense on the road by OPS (.747), a stark contrast to their home splits.

• Meanwhile, the Mets rank seventh in overall OPS (.740) and jump to .761 vs. right-handed pitching, which they’ll see in Peralta.

• Both teams feature power at the top of the order, and a quick two- or three-batter rally could break this open early.

• Combine that with weather conditions favorable to hitters and shaky underlying pitching metrics, and +108 value on the YRFI is worth taking.

Bet: YRFI (+108)

Early-inning run bets aren’t just about ERA,  they’re about opportunity, matchups, and lineup strength. The Diamondbacks’ league-leading first-inning production, paired with two volatile starters, makes their game with the Giants a prime YRFI target. And while Mets-Brewers may seem like a low-scoring affair on paper, deeper data points to early offensive potential.

When the numbers and the narrative align, betting first-inning runs can be one of the sharpest plays on the MLB board. And on July 1, both of these matchups offer value before the second pitch is even thrown.