Miami — The Gerald Green era lasted one tumultuous season with the Miami Heat.

The high-flying swingman, who went from essential component to afterthought in the Heat’s rotation last season, has agreed to a one-year, veteran-minimum contract with the Boston Celtics, similar to the one he played under last season in his lone season with the Heat.

Green was a longshot to return after the Heat added athletic forwards James Johnson and Derrick Williams in free agency. The Heat also are expected to allocate considerable minutes in the rotation to returning wing players Justise Winslow, Josh Richardson and Tyler Johnson, with guard Wayne Ellington brought in to provide the type of 3-point shooting the Heat expected last season from Green.

Green appeared in 69 regular-season games with the Heat, starting 14, averaging 8.9 points on .392 shooting from the field and .323 shooting on 3-pointers.

Green, 30 opened his Heat tenure with a bang, scoring 19 points in last season’s opening game, against the Charlotte Hornets at AmericanAirlines Arena. But by the fourth game of the season he was lost to the team after a bizarre incident that left him in an argumentative and, according to one report, violent state at a Miami residence, later hospitalized. After being listed as sidelined for four games due to “illness” by the Heat while away from the team, he then was placed on a two-game team suspension for “conduct detrimental to the team.”

Green had indicated a desire to return to the Heat, who were positioned to offer the same $1.4 million for 2016-17 offered by the Celtics.

For Green, the move is a return to his NBA roots, originally selected by Boston at No. 18 in the 2005 NBA draft, before being traded to the Minnesota Timberwolves in the 2007 deal that netted the Celtics forward Kevin Garnett. The Heat were the ninth NBA franchise of Green’s career, with stops in Russia, China and the NBA Development League along the way.

The Celtics have been among the more active teams in the Eastern Conference this offseason, selecting Cal forward Jaylen Brown with the No. 3 pick in June’s draft and signing away Atlanta Hawks free-agent center Al Horford, after making an unsuccessful free-agency pitch to Kevin Durant.

By rule, players signed as free agents during the offseason cannot be traded until Dec. 15 at the earliest.