Conversation so far:
What is the Pistons roadblock referring to?
despite pushing the series to seven games, the Bulls lost to the Pistons for the third consecutive season.
What year did the Bulls lose to the Pistons for the third consecutive season?
the 1989-90 season.
Who was their coach at the time?
new coach Phil Jackson.
Who were other players on the Bulls' team at this time?
their core group of Jordan and young improving players like Scottie Pippen and Horace Grant.
How well did Jordan play during this year?
Jordan averaged a league leading 33.6 ppg on 52.6% shooting, to go with 6.9 rpg and 6.3 apg in leading the Bulls to a 55-27 record.

Question: At what stage did they end up losing to the Pistons?
Self-contained rewrite: At what stage did the Bulls end up losing to the Pistons?