sinfield , 34 , the greatest captain in leeds ' history , stunned the world of rugby league with his sudden announcement that he will quit the sport at the end of the season and join the rhinos ' sister club yorkshire carnegie on an 18-month contract .
sinfield , who is closing in on third place in rugby league 's all-time scoring list with 3,997 points , told a news conference at headingley he did not want to play against rhinos .
the opportunity to spearhead carnegie 's bid for a premiership return was too good to resist .