Ray Allen vs. Kevin Garnett/Rajon Rondo
No on-court altercations here, but some Celtics clearly took exception to Allen signing with the Heat after the 2012 season. After Allen left, Garnett said he had lost Allen's phone number and would not be speaking to him. He also snubbed Allen's handshake attempt on opening night. Rondo refused to mention Allen by name, referring to him as "that guy".