Most brutal beating u've seen over 12/15 rounds?

[240sxdippin]

Mayweather-Gatti. Complete annihilation physically and mentally.

over 12-15 rounds though. i was going to say that but then i remembered the WHOLE question. mayweather/corralles was pretty bad too. only his heart was keeping him on his feet

[SyrianPoster]

Pacquiao vs Margarito

[MJ223]

Holmes-Ali didn't make the full 12 (it was 10) but it was brutal.....

[White_Knight]

Kessler vs Andrade. Not as bad as some of the others mentioned here, but still quite bad.

[vacon04]

One of them is Vitali vs Briggs ... here's the video of the last two rounds in which Vitali lands some huge bombs

[keehlnate]

Pacquiao - Diaz = that was brutal but it didn't last 12 rounds

so I guess it would be

Pacquiao - Margarito

[MASTERFUL]

[MASTERFUL]

[SkyKng]

One of them is Vitali vs Briggs ... here's the video of the last two rounds in which Vitali lands some huge bombs

judging by this vid briggs took a dive. he clearly had the skill and ability to do a lot more than he did, and he wasn't dead tired. look at the punch at 3:50 .. vitali was so slow and predictable shannon could have countered him all day if he wanted