Lem's latest: Maidana, Alexander rise to challenge; Broner-Perez heats up

Marcos Maidana could be facing an uphill climb in more ways than one when he meets former WBC/IBF junior welterweight titleholder Devon Alexander in a welterweight clash at the Scottrade Center in Alexander's hometown of St. Louis, Mo. Not only will Maidana (31-2, 28 knockouts) be rising in weight, but he'll also be meeting a man in Alexander (22-1, 13 KOs) who is both a southpaw as well as a boxer-puncher -- attributes that have caused problems for the Argentinian in the past. It doesn't help t…