Can the Boston Celtics make history this season and join the 1995-96 Chicago Bulls as the only teams in NBA history to win 70 games? Phil Jackson, the resident expert on this matter, isn't certain yet.

Jackson coached that Chicago team to a 72-10 record and the fourth of his six championships with the Bulls. The Celtics entered Sunday on pace for a NBA-record 73 victories. Will it happen?

"I don't want to guess," Jackson said. "It's so difficult. They have Detroit in their conference. Teams have injuries, and they wear down. It's just too hard to say. When we're in March, we can talk about it."