That the Rockets have had the first pick in the NBA Draft 5 times which is clearly the most. Who is in 2nd place and how many times have they chosen first?
Milwaukee also has 5. But two are from a franchise other than the Bucks. The Knickerbocker franchise has 4. It appears you are combining 4 Houston Rockets + 1 San Diego Rockets for 5. With this logic, the Rochester Royals / Cincinnati Royals / KC Kings / SAC Kings franchise also has 4 (1 in Rochester + 3 in Cincy). I believe the Philadelphia / Golden St Warriors also have 4 (2 each).