Don't expect Joe to be fired. Expect a vet coach to be brought in as an assistant:
"The sentiment around Boston as recently as last week’s NBA Draft Combine in Chicago, sources said, was that the Celtics would afford Mazzulla, 34, quite a bit of runway to grow into an elevated role on the team’s sideline. Stevens himself was 36 when Danny Ainge anointed the former Butler head coach as Boston’s steward, to the tune of a six-year contract that awarded Stevens all the support and opportunity to develop. If the Celtics suddenly reversed course on Mazzulla, it would be a stark change of direction from the franchise’s original intent to allow Mazzulla similar time to flourish in the position, sources said, even considering Boston’s contending roster as opposed to the rebuild Stevens once inherited."
"A nearing conclusion to the Celtics’ season should prompt at least some level of coaching change. Boston has been connected to two former head coaches in Frank Vogel and Stephen Silas as veteran additions to its staff, sources told Yahoo Sports. "
The vet coach should have been brought in day 1 with Joe. Just an abject failure by Wyc and Brad through this whole thing.