by Paul Teetor Watch out, Bay League football teams: here come Redondo and Mira Costa. For the first time in seemingly forever, both the Sea Hawks and the Mustangs are co-favorites to rule the Bay League this fall, along with traditional power Palos Verdes. Of course, anything can happen once league play starts Friday. But Redondo will travel to Peninsula Friday night proudly carrying a 5-0 record, while Costa, with a 4-1 record and one of the most explosive offenses…