Complex sentence: As of February 2017, Joshua is ranked as the world's best heavyweight by BoxRec and second by the Transnational Boxing Rankings Board, fifth best by "The Ring" magazine, and currently boasts a 100% knockout-to-win ratio.
Split into simpler sentences: As of February 2017, Joshua is ranked as the world's best heavyweight by BoxRec, second by the Transnational Boxing Rankings Board, and fifth best by "The Ring" magazine. He also boasts a 100% knockout-to-win ratio.