I added some notes to my previous comment.
But hey, probably you are most likely right about Robertson not deserving to be there because the spurs had really crappy records with Robertson. He had the bad luck of being in a total rebuilding process. I am surprised he received so many defensive honors with such a losing team.
from spurs.com history section:
1985-87: A Four-Year Drought Begins
The next season was the first of four very lean years for the Spurs. Shortly before the start of the 1985-86 campaign the team made a surprising trade by sending Gervin to Chicago for David Greenwood. Despite the loss of "the Iceman," the team played well through December and stood at 19-13 two months into the season. But on December 26 Moore was hospitalized with desert fever. The rare disease not only kept him out for the year, it also ended his career.
San Antonio bumbled through the rest of the season, losing 10 of 16 games in January, 12 of 13 from early February to early March, and 13 of 16 overall in March. A 35-47 record was the team's worst showing since relocating to San Antonio from Dallas.
Not to be overlooked in the midst of the Spurs' mediocre performance was the excellent season of second-year player Alvin Robertson. He earned a handful of awards, including NBA Defensive Player of the Year and NBA Most Improved Player, and he represented the Spurs at the NBA All-Star Game. Robertson recorded 301 steals to set a new league record, and on February 18 he became only the second player in NBA history to chalk up a quadruple-double with 20 points, 11 rebounds, 10 assists, and 10 steals.
I will stop talking about Robertson right now because he is not the point of this thread.