Also the mighty men of the armies: Asahel the brother of Joab, Elhanan the son of Dodo of Bethlehem,
It is quite possible that the two lists varied to some extent originally. The writer of Chronicles distinctly states that he gives the list as it stood at the time of David’s becoming king over all Israel 1 Chronicles 11:10. The writer of Samuel does not assign his list to any definite period of David’s reign, but probably delivers it to us as it was constituted at a later date. It is quite possible therefore that the names which occur only in Chronicles are those of persons who had died or quitted the army before the other list was made out, and that the new names in Samuel are the names of those who had taken their places. See the 2 Samuel 23:39 note.