a datatable doesnt quite work like your describing its more of a read only type of thing. for your case i would use a array of structs possibly, depending on the situation. the array of structs variable will have closer to the functionality your mentioning where you can read and write the values.
in any event you will want to create a struct which contains the needed fields. i cant speak for multiplayer but for single player you may want to store your stats in the game instance since it persists between levels and its convenient place to have things stored for when you go to save the game.