A league source tells us that the Miami Dolphins have signed fullback Lousaka Polite to a two-year contract extension, financial terms of the extension aren't yet known. Polite, who entered the league in 2004 with the Cowboys under coach Bill Parcells, signed with the Dolphins in 2008 after a year in Chicago. The Pitt product was due to make $620,000 in 2009, the final year of his deal. Source: MikeFlorio, PFT