One major difference between the Celtics and Heat is deciding the East finals

MIAMI — In late January, the San Antonio Spurs traded backup guard Bryn Forbes to the Denver Nuggets. Five months later, that unassuming move has made a major impact on the 2022 Eastern Conference finals.

It was the opening of an opportunity for the Boston Celtics that has been fully realized, as they have pushed the Miami Heat to the brink after a 93-80 Game 5 win on Wednesday and a 3-2 series lead.

It had been eight years since the Spurs…