WALTHAM — The Celtics developed the concept of the “sixth man” in the 1960s, and the team has employed some of basketball’s best in that role. Now, with former Sixth Men of the Year Leandro Barbosa and Jason Terry on the Boston bench, there might be a call to recognize a “Seventh Man of the Year.”

Terry has set the tone for the Celtics reserves since arriving as a free agent, and Thursday he reiterated the second unit’s high aspirations.