...Pro football hall of famer and former television actor Merlin Olson has died....Olsen was part of the Los Angels Rams fearsome foursome defensive line,which set an nfl recored for the fewest yards allowed in 1968.He moved on from football to acting roles in Little house on the prairie and his own series father Murphy.Olsen was diagnosed with Mesothelioma last year.He passed away last night.Olsen was 69.