Can someone explain what it means when a figher "carries' another fighter?

[raskat]

lucian bute on glen johnson

Mayweather vs.Marquez

In none of these 2 fights was the winning fighter carrying the losing fighter.

[Ray Corso]

......simply allowing your opponent to get to the end of the fight without being tko'd or KO'd! Loosing on points!! Ray.

[mconstantine]

LOL @ 3:57

[bose]

Demarcus Corley hurting Mayweather than proceeds to back off and allow him to survive the round.