Philadelphia is eliminated from first place.

To show that Philadelphia is eliminated from first place, we start with the current conference standings:
            Team	W	L	GL	PCT	GB
         Detroit	51	19	12	0.729	0.0
          Boston	47	23	12	0.671	4.0
        New York	46	25	11	0.648	5.5
       Cleveland	43	27	12	0.614	8.0
         Toronto	39	30	13	0.565	11.5
         Orlando	38	31	13	0.551	12.5
         Atlanta	38	32	12	0.543	13.0
           Miami	38	32	12	0.543	13.0
    Philadelphia	38	32	12	0.543	13.0
       Charlotte	36	34	12	0.514	15.0
       Milwaukee	28	41	13	0.406	22.5
         Chicago	28	42	12	0.400	23.0
        Brooklyn	17	53	12	0.243	34.0
      Washington	16	53	13	0.232	34.5
         Indiana	15	55	12	0.214	36.0
           Total	518	529	183

Philadelphia can finish the season with at most 38 + 12 = 50 wins and will finish the season behind the following teams:
Detroit has already won 51 games.