No way Parish cannot be the Center. I understand the logic behind trying to slide Radja over, but in 4 years for the C's Radja averaged 16.7ppg, 8.4rpg, 1.3bpg, and 1.6apg and never made the All-Star team and those numbers were on bad teams for the most part, but in Parish's 5 years for Boston in the 90's (including 89-90 season, not sure if others are counting that season or not) he averaged 13.8ppg, 9.3rpg, 1.2bpg, 1.0apg and made 2 All-Star appearances. While the stats are comparable, the teams Parish played on in the 90's averaged 48 wins per year, while Radja's teams averaged 29 wins per year. Parish played Center for the C's for 5 years in the 90's and was an All-Star twice. I don't think any other big man comes close to playing that many seasons at Center, and we all know no other Center since has made the All Star team. I think Parish is the Center hands down.
Really the team should be this:
C - Parish (5 seasons, 2 time All Star)
F - McHale (4 seasons, 2 time All Star)
F - Bird (3 seasons, 3 time All Star)
G - Lewis (4 seasons, 1 time All Star)
G - ?
The last guard spot is probably the only spot that I think can be debated. I'd say it's between Barros (4 seasons), Douglas (5 seasons), Brown (8 seasons). You could get by with any of them in the point guard spot (especially considering the rest of the team), and Brown might win out since he was the most tenured, but I would pick Douglas the pure point and I remember him leading the C's to the playoffs in '95 (if you consider 35 wins leading...)
I love Antoine (3 seasons, 1 time All Star), but I don't think you can put him above McHale or Bird, and Pierce only played one lockout shortened season.
Of course I think the question was probably figuring All 90's team excluding the holdovers from the 80's like Bird and McHale. I have no clue who I would put at Center (maybe slide Dino over because Montross is the most tenured at 2 seasons I think). Walker at the 4, Eric Williams at the 3 (how could no one have mentioned him yet?), Brown at the 2, and Douglas again at the point.
* In my numbers, I'm including the 89-90 season which I figure is part of the 90's, but not the 99-00 season which I figure is part of the 00's.