Atlanta is eliminated from first place.

To show that Atlanta is eliminated from first place, we start with the current conference standings:
            Team	W	L	GL	PCT	GB
          Boston	64	18	0	0.780	0.0
        New York	50	32	0	0.610	14.0
       Milwaukee	49	33	0	0.598	15.0
       Cleveland	48	34	0	0.585	16.0
         Indiana	47	35	0	0.573	17.0
         Orlando	47	35	0	0.573	17.0
    Philadelphia	47	35	0	0.573	17.0
           Miami	46	36	0	0.561	18.0
         Chicago	39	43	0	0.476	25.0
         Atlanta	36	46	0	0.439	28.0
        Brooklyn	32	50	0	0.390	32.0
         Toronto	25	57	0	0.305	39.0
       Charlotte	21	61	0	0.256	43.0
      Washington	15	67	0	0.183	49.0
         Detroit	14	68	0	0.171	50.0
           Total	580	650	0

Atlanta can finish the season with at most 36 + 0 = 36 wins and will finish the season behind the following teams:
Boston has already won 64 games.
New York has already won 50 games.
Milwaukee has already won 49 games.
Cleveland has already won 48 games.
Indiana has already won 47 games.
Orlando has already won 47 games.
Philadelphia has already won 47 games.
Miami has already won 46 games.
Chicago has already won 39 games.