Conversation so far:
What is the Portland Trail Blazers
The Portland Trail Blazers, commonly known as the Blazers, are an American professional basketball team based in Portland, Oregon.
When did Bill Walton join the Portland Trailblazers ?
Walton was the number one overall pick by the NBA's Portland Trail Blazers in the 1974 NBA draft. Walton signed with the Trail Blazers.

Question: Against whom did he play while with the Trailblazers?
Self-contained rewrite: Against whom did Bill Walton play while with the Trailblazers?