The Dolphins signed fullback Lousaka Polite to a two-year contract extension through the 2011 season, according to his agent Peter Schaffer.
 
Polite, 27, was signed last October to replace fullbacks Boomer Grigsby and Casey Cramer, who were both waived after nondescript stints. The 6-foot, 245-pound Polite was extremely effective in short yardage situations. In eight third- [...]