Mosley, dengan rekor 44-5 di antaranya 37 menang KO, menyandang gelar dunia di tiga kelas tetapi petinju veteran berusia 36 tahun itu kalah angka Nopember lalu ketika melawan juara WBA, Cotto.
Mosley, 44-5 with 37 knockouts, has won world crowns in three weight classes but the 36-year-old veteran lost a decision last November to unbeaten World Boxing Association champion Cotto.