WALTHAM — After spending time with his ill son on Friday night at a local hospital, Ray Allen  re-joined the Celtics  for their plane trip to Miami and should be available for Sunday night’s game in Miami in the opener of the team’s four-game road trip, according to the team.
Allen was not at Celtics practice on Saturday. Walker Allen, 2, was diagnosed with diabetes during the 2008 NBA Finals  and Allen spent the night with him on Friday night after getting word after the game that he was not feeling well.
“There really is no update,” Celtics coach Doc Rivers  said after Saturday’s practice. “It’s more his son. He’s [caring for] Walker, obviously. That’s why he’s not around.”