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The audit that quietly broke the SOG market
For four seasons I had a working SOG model that hit at 53-54% on Over plays. In November 2024 it stopped working. By February it was hitting 47%. I hadn’t changed the model. The market hadn’t moved much either — the lines were still in the same range. What had changed was the underlying data feed.
NHL goaltender save percentage hit its lowest level in three decades in 2024-25. That’s the headline most readers saw. The cause underneath the headline is what matters for shots-on-goal betting: the league tightened its audit of what counts as an official shot, and the auditing changed the SOG totals every single match.
SOG props have become a battlefield where the basic statistic itself is being redefined while punters still play the old playbook. This piece walks through how to read SOG markets given the audit, where the new mispricings live, and why scorekeeper bias still matters in 2025-26.
What actually counts as an official shot
Most punters who bet shots on goal don’t know the rule. An official shot is a puck that either enters the net or would have entered the net had the goaltender not stopped it. Shots that hit the post, miss the net wide, or get blocked before reaching the goaltender don’t count.
The distinction sounds clean. In practice, it’s a judgement call made in real time by an arena scorekeeper. A wrist shot heading wide that the goaltender reaches for with his glove — is that a save or a miss? A point shot deflected by a defenceman before reaching the crease — is that blocked, or does it still count? The decisions get made by humans watching at speed, and they vary.
The data column also matters. Some operators settle SOG prop lines off NHL.com official scoring, others off a third-party feed that may treat post and crossbar shots differently. The settlement rule appears in operator T&Cs but rarely on the bet slip. If you’re taking SOG props seriously, you need to know which source your operator uses, because a player at 3.5 SOG on one feed might be 4 on another.
There are three derivative numbers that punters confuse with shots on goal. Shot attempts (Corsi) include every puck flicked at the net — missed, blocked, on target. Unblocked shot attempts (Fenwick) subtract blocked shots. High-danger shots are shots from the slot area where conversion rates spike. Only shots on goal feed the SOG prop market, but Corsi and Fenwick predict it better than seasonal SOG average does.
The shot audit and what it actually changed
Martin Biron, the former NHL goaltender now working as an analyst, said it plainly: all of that auditing that the league is doing with shots, and honestly it stems from gambling — people don’t want to lose their bets if there was a shot that was missing the net or whatnot. The audit is real, and Biron’s framing of it points at the cause directly.
Jake Oettinger, the Dallas Stars goaltender, put the numerical effect on the record. They just take shots away that are shots on goal, he said, and his estimate was about three per match. He worked the maths himself: three shots times 50 games is five more shutouts effectively erased from a goaltender’s profile. Five shutouts is a Vezina-level swing on a single goaltender’s season.
For SOG props the implication is simple. Three shots per match removed from the official total means roughly 1.5 shots removed from each team. Spread across 18 skaters, that’s a tenth of a shot per player per match — small in isolation, but if those removed shots concentrate on certain shooter types (long-range wrist shots from defencemen, for instance), then specific player props move more than the average suggests.
The 2024-25 result on SOG markets was that Over plays underperformed expectations. The model I tracked — Over 3.5 on top-six forwards averaging 3.6 shots per match — hit at 48% rather than the 52% the line implied. That’s a structural loss against juice, and it kept punters bleeding for an entire season.
By the second half of 2024-25 the lines themselves had adjusted. A player previously priced at 3.5 was now priced at 2.5. But the punters who hadn’t tracked the audit kept playing 3.5 like it was last year’s line, and lost. For the SV% side of the same shift, the SOG audit and goaltender SV% are two sides of the same shift piece traces it from the goaltender’s angle.
Scorekeeper bias is real and it varies by arena
Some arenas reliably credit more shots than others, and the gap is measurable across seasons. The historical analyses of this — admittedly older now — showed gaps of up to 6-8% in shot totals between the most-generous arena and the most-stingy. A player taking the same 25 shot attempts will have his official SOG count vary by 1.5-2 shots depending on where he’s playing.
The reason is that arena scorekeepers are local employees. They watch every match in that building, develop habits, and apply judgements consistently within their own building but inconsistently across the league. Madison Square Garden has historically been a generous shot environment. So has the United Center. The Bell Centre and Scotiabank Arena have historically been stingier.
For SOG props this matters more than most punters realise. A forward averaging 3.5 shots per match across the season is averaging 3.8 at home and 3.2 on the road — sometimes. Sometimes it’s reversed. The point is that the gap exists, and a punter who reads the venue before reading the line can find soft spots.
The 2024-25 audit attempted to standardise scorekeeping across arenas. Whether it succeeded is debated. My own tracking suggests the gaps between arenas narrowed in 2024-25 but didn’t disappear. The arenas with historically generous shot counts now sit closer to league average, while the historically stingy arenas have moved slightly closer to median.
Defencemen and forwards price differently in SOG markets
Forward SOG props are the headline market. Top-six forwards typically sit at 2.5 or 3.5, with prices clustering around 1.85 on both sides. Defenceman SOG markets sit at 1.5 or 2.5, with similar pricing structure.
The error new punters make is treating forward and defenceman SOG props as equivalent products. They aren’t. Forward shots come from in tight (slot, crease, deflection) and are higher-quality. Defenceman shots come from the point, are lower-quality, and are vulnerable to being credited as missed or blocked rather than on-target depending on scorekeeper judgement.
The implication: defenceman SOG Over markets are structurally more vulnerable to the audit than forward markets. A top-pair offensive defenceman taking 4-5 shots per match might see his official SOG count drop by half a shot per game post-audit, because his shots are most often the ones being reclassified.
The trade-off: when an offensive defenceman is taking high-volume shots from inside the blue line — closer to the slot than the point — those shots survive the audit better. Players like Cale Makar or Adam Fox, who walk the line and shoot from mid-range, are more audit-resilient than pure point shooters.
EIHL SOG data and what’s missing
EIHL doesn’t publish shot data with anywhere near the depth NHL does. League leaders typically average 3.5 to 4.5 shots per match, which fits NHL forward norms, but per-match data isn’t readily available for most punters. Where UK books list EIHL SOG props at all, they price them off scraped data feeds that may lag actual match details by 24-48 hours.
The practical implication: EIHL SOG markets exist on a handful of operators but trade thinly, and there’s little point trying to outsmart the books on a market neither side has solid data for. For deeper coverage on the EIHL data limitations, the topic gets owned in the EIHL Betting Tips piece — this is the working ceiling for what a UK punter can realistically model.
Frequently asked questions
Why does the same player get different SOG totals in different arenas?
Arena scorekeepers are local employees who watch every match in their building. They develop habits about what counts as a shot on goal versus a missed shot or a blocked shot, and those habits vary across the league. Historically, arenas like Madison Square Garden and the United Center have been generous shot environments while the Bell Centre and Scotiabank Arena have been stingier. The 2024-25 audit narrowed but didn’t eliminate the gaps, and a player can see his official SOG total swing by 5-8% depending on venue.
Has the NHL’s shot-audit policy permanently shifted SOG markets?
The audit has structurally lowered official SOG counts by an estimated three shots per match across both teams since it began. Players who held 3.5 SOG lines for years have seen their lines drop to 2.5 as books adjusted to the new data feed. Whether the audit becomes the new permanent norm or relaxes over time is uncertain, but the underlying definition change is now baked into pricing. The punter who hasn’t adjusted continues betting last-season’s lines on this-season’s totals — a structural loss against juice.
