Potential spoiler below:
That was a real pick em fight. Marcin's probably more skilled, but the power differential was the X factor. Marcin just couldn't put Lewis away and let him hang around too long, and towards the end of a 3-round fight, he has just enough energy to still be dangerous. You can argue that the ref could have let the fight go a few more punches, but it looked like he wasn't intelligently defending himself any longer and was about to be put out cold, so I can't complain. Good back and forth fight.