5 if we count Doc, who will get there someday for coaching. But of course we're talking about Rondo here.
Rajon is not a HOFer today - he's probably still not quite there even if we get another ring and he gets Finals MVP this year. But barring injury or some other unforeseen event, there is no question he'll make it to the Hall. Rondo is still just 26, and could easily play at a high level for another 7-9 years. If so, he's likely to finish with 12000+ points, 10000+ assists, 5000+ rebounds, and 2000+ steals. He is already a 3x All-Star, 4x Defensive 1st or 2nd-teamer, with one All-NBA 3rd team to his credit. Those numbers are all likely to grow over the years.
But it's the playoffs where he truly shines - Rondo is already in the Top 20 all-time for playoff assists, and in the top 5 for triple-doubles. The all-time list for assists in a single playoff season reads Magic Johnson, Magic Johnson, Magic Johnson, Magic Johnson...Rajon Rondo. (then Magic, Stockton, and Magic again) And he's climbing toward the top 10 this year as well. He's also climbing the all-time playoff charts for steals, points, even rebounds. And of course he's a winner - 1 ring, 1 conference championship, and at least an ECF this year - 11 series wins and counting so far. The resume is slowly becoming undeniable. Rondo will be in Springfield, and probably no later than his 2nd or 3rd ballot, if not 1st.
Years down the line, we'll be remembering these Celtics teams, and Rondo will be a much bigger part of the story than we sometimes give him credit for. We've had our ups and downs with Rondo - he can be frustrating, even infuriating with inconsistency and seeming complacency at times. But make no mistake - this is an all-time point guard wearing green right now. Hats off to Rajon, and the brilliant career both ahead of and behind him.