Members of the Boston Celtics link arms during the singing of the national anthem before the preseason game against the Brooklyn Nets at TD Garden on Oct. 17, 2016, in Boston. (Maddie Meyer/Getty Images)

NBA Commissioner Adam Silver sent a memo to teams on Friday saying that he expected players and coaches to stand for the national anthem before games, as is the rule.

The memo also recommended that teams show videos expressing themes of unity before their first home games, a possible compromise to those players who would like to speak out about social injustice and their right to protest with the league rule.

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In the memo, Deputy Commissioner Mark Tatum suggested that teams use their opening games “to demonstrate your commitment to the NBA’s core values of equality, diversity, inclusion and serve as a unifying force in the community,” according to the New York Daily News.

Two of the NBA’s biggest stars and rivals, Stephen Curry and LeBron James, called out President Donald Trump last week for suggesting that those NFL players who did not stand during the playing of the national anthem should be “fired” and calling them “sons of bitches.”

James called the president a “bum,” while other players expressed their disagreement with the president.

It should be an interesting season for a league of mostly (82 percent) black men who are seen as having more political (and financial) power than those in the NFL.

No word on what the penalty is if the rule is broken.

Read more at the New York Daily News.