Rule 21 and Rule 15. See Goston v. Potter No. 08-cv-478 FJS ATB, 2010 WL 4774238, at •5 (N.D.N.Y. 2010) (citing Bridgeport Music, Inc. v. Universal Music Grp., Inc. 248 F.R.D. 408, 412 (S.D.N.Y. 2008)). 4 GIUFFRE0021347 EFTA00097410 Case 9:08-cv-80736-KAM Document 324 Entered on FLSD Docket 04/07/2015