Sosa turned down an offer to sign a non-guaranteed contract with the Washington Nationals on Wednesday. The offer, which would have included performance bonus opportunities, came after Sosa first rejected the Nationals' offer of a minor league contract that included an invitation to spring training. (Updated 2/15/2006) Analysis: Despite ranking fifth on the career home-run list with 588, Sosa hit just .221 with 14 home runs and 45 RBIs last season with Baltimore. Without a team, Sosa is expected to retire, ending his 17-year career.