The Chargers have signed DT/DE Alfonso Boone to a 1-year deal.  Boone played in 15 games for the Chiefs last season and he made 17 tackles, defensed 1 pass and he had 1 sack.  Boone has now played in 113 games in his 8-year NFL career and he has made 150 tackles, defensed 13 passes, has 12.5 sacks and he has forced 1 fumble.  The 33-year old Boone doesn’t have a lot of tread left on his tires but the Chargers are gettting desperate.