January 30, 2013 - by Tom Federico
Over in our premium NFL forum, which is available to TeamRankings subscribers (sign up now), we’ve been posting daily, data-driven analysis of Super Bowl prop bets. We take care to do a deep, thorough analysis of each of the props we look into, and wanted to post one of our analyses on the blog to give all of our readers an example.
If you like what you see here, there are seven other props broken down in the NFL forum so far, with more coming. And if you’re a subscriber and you want us to look at a specific prop, just ask us in the forum! We love fielding questions.
TR’s David Hess has rolled up his sleeves and jumped headlong into the data to explore this prop. The lines mean that San Francisco is the favorite to score first, but where is the value?
As always, let’s start by looking at historical rates. These are the rate of the favorite scoring first in games with similar spreads (2 to 5) and similar over/unders (44.5 to 50.5):
So that would lead us to believe that San Francisco has about a 60% or 61% expected rate.
Next, how often did each team score first this year?
All games: 10 of 19 (53%)
In wins: 8 of 13 (62%)
In losses: 2 of 6 (33%)
All games: 10 of 18 (56%)
In wins: 8 of 13 (62%)
In losses/ties: 2 of 5 (40%)
Given the above team info, it seems like we should expect the winning team to score first about 60% to 65% of the time. Let’s use 62%. Given 65% win odds for San Francisco from our Game Winner picks page, that works out to:
Do the addition and we get:
Hmm, that’s quite a bit different than the estimate we got from historical data. But let’s say together they give us a range: 53% to 61% chance that SF scores first (so a corresponding 38% to 47% that Baltimore scores first).
The break even rates on the lines we listed at the top are in the following ranges:
So the team data from this season (which gave us a BAL 47% estimate) would imply there might be a touch of value on BAL +117 at Pinnacle. However, the historical data (estimate of 61% SF) would lead us to believe there is solid value at all the SF lines.
However, we’re overlooking another factor here: this season, when the Ravens win the coin toss, they have mostly opted to defer. (Another one of our prop analysis posts in the NFL premium forum explores that trend.) That means if we’re going just off of historical data, we should adjust San Francisco’s odds up a little, since the teams that receives the ball first tends to score first.
Given the MUCH larger sample size involved in the historical data, I am more inclined to trust that estimate, rather than the one we tried to make based off of Baltimore’s and San Francisco’s 2012 data. That would lead us to suspect the value is on San Francisco. Taking into account that the Ravens are prone to deferring when they win the coin toss, we’re forced to lean even more over the the SF side of the fence.
Value on SF to score first, at any of the posted lines.
As always, please let me know if you think we overlooked something!
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