No disrespct to the 1977 championship team, but there are multiple guys whose numbers are retired who weren't even starters on that team and did nothing else significant in their careers. They were role players on a team that made an unexpected and miraculous championship run. If being a contributor to that lone championship is enough to get your number retired in Portland, what about Johnny Davis and Tom Owens. They played more minutes and scored more points for that team than Neal, Twardzik and Steele.
Roy was a team leader and better player and than those guys (other than Walton of course), but just wasn't part of a team capable of winning it all, or even getting out of the first round. Roy's teams won more games in his first four years than Petrie's teams did during his entire six year career and Petrie's team never even sniffed the play-offs. But, Petrie's number is retired.
Yes, Portland has been too eager to retire player numbers, but based on the 10 they have retired, Roy certianly qualifies both in terms of minutes played, total contributuion and quality of play.
BNM