Football Sunday today (Sept. 24) saw a plethora of support for the ongoing protest movement started by Colin Kaepernick, with several teams choosing to kneel in solidarity during the national anthem.

However, members of the Seahawks, Titans and Steelers, for example, stayed in their respective locker rooms as the anthem played, a choice that many have since criticized, including Russell Simmons.

Taking to Twitter, the music mogul shared his reaction to the conscious choice several NFL teams made earlier today, breaking his typical cool demeanor to vent his frustration.

“Locking arms and staying in the lock room hiding is for bitches,” the Def Jam co-founded stated. “I’m sorry I’m so upset WTF. So we not sure if black lives matter.”

He then followed up the tweet with a second, further elaborating as to why he was so upset.

“I regret my choice of words, but a coach coming out and saying we don’t wanna be politicized is not supporting your brother or BLM,” he added.

Simmons joins the likes of Sean “Diddy” Combs, J. Cole, Mysonne, Cardi B and more, who all took to social media today to vocalize their support of the players in the NFL who chose to take a stand against Donald Trump, inequality and oppression.

Take a look at Russell Simmons sharing his frustrations in the tweets below.