NBA fans aren’t happy about players resting.

The league’s TV partners aren’t thrilled about it either.

Now, NBA Commissioner Adam Silver has once again expressed his concern about the issue in a memo delivered to teams on Monday. In the memo, he called the topic “an extremely significant issue for our league” and said teams will face “significant penalties” if they don’t follow league rules for reporting player injuries and illnesses.

Silver indicated that there would be a “full discussion of this issue in our Executive Session” of the Board of Governor’s meeting on April 6.

One week after the Golden State Warriors sat Steph Curry, Klay Thompson, Draymond Green and Andre Iguodala against the San Antonio Spurs on a Saturday ABC game, the Cleveland Cavaliers sat LeBron James, Kyrie Irving and Kevin Love against the Los Angeles Clippers Saturday in another ABC game.

ESPN first reported the details of the memo, and USA TODAY Sports later obtained the memo.

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Silver also implored owners to take an active role in managing rosters and making sure basketball operations staffers understood the business ramifications of sitting players.

“Decisions of this kind do not merely implicate issues of player health and team performance on the court; they also can affect fans and business partners, impact our reputation, and damage the perception of our game,” Silver states in the memo. ” With so much at stake, it is simply not acceptable for Governors to be uninvolved or to defer decision-making authority on these matters to others in their organizations.”

On Monday, ESPN released a statement regarding teams’ decision to rest players.

“As always, our aim is to serve NBA fans with the best matchups involving the league’s top stars and we share the fans’ disappointment,” the statement said. “We…