(Click chart for full-size version. And if you missed our first Databomb, click here.)

By Reed Kuhn, @Fightnomics

There’s lots of talk about what submissions work better than others in MMA. But we should at least agree that all submissions are not created equal. Some are easier to attempt, and some are easier to finish. But which ones are which?

Examining both the attempt and success rates for each submission type in the UFC since 2007 reveals that some of the most common submissions attempted are actually the hardest to finish. Notably, guillotine chokes and shoulder locks (like kimuras) have very low success rates — 14% and 6%, respectively — despite being attempted fairly frequently. And really, who taps to ankle locks these days? No one still holding a UFC roster spot, that’s who. Meanwhile, no submission is nearly as successful as the rear-naked choke, which results in a tap (or nap) 41% of the time.

So the next time a UFC fighter goes for a guillotine or ankle lock, and the overeager fan at the bar thinks it’s all over — quick! — bet him the next round that there’s an escape…and cheers.

For more on the science and stats of MMA, follow @Fightnomics on Twitter or on Facebook. See more MMA analytical research at www.fightnomics.com.

(Click chart for full-size version.)

By Reed Kuhn, @Fightnomics

Other than Kenny Florian, who finishes fights? Let’s settle it once and for all. Using data provided by FightMetric, we looked at how every UFC fight ended from 2007 through the first half of 2012 — a total of 1438 total fights, excluding three flyweight contests — and then divvy’d it up by weight class to determine percentages for each method. For the first time ever, all these stats are in one place, in the chart above. Boom — you’ve just been databombed.

The conclusion: Size matters. Stoppages increase steadily by weight class; but while striking finish rates correlate strongly with increasing weight, submissions have a weaker, negative correlation. Keep in mind that bantamweights and featherweights have a short history in the UFC so far, so expect some possible smoothing out of those division trends over the next year.

Do any of these results surprise you? Next time the local Bullshido expert tells the bar that his favorite featherweight will finish the next fight, bet him the next round of drinks that it’ll go to the cards.

For more science and stats of MMA, follow @Fightnomics on Twitter or on Facebook. See MMA analytical research at www.fightnomics.com.