Schalke and U.S. midfielder Weston McKennie published a video on social media on Wednesday that mixed footage of police officers using force against black people with clips of football players and other athletes saying: "Enough is enough."
Elsewhere, several U.S. players have spoken out about their experiences of racism in the MLS and abroad.
"It's the system, it's a systemic thing," Chicago Fire forward C.J. Sapong said of the lack of diversity in the MLS on Banter with Taylor Twellman. "When you look at the experiences that black players in this league have had, especially African players or darker South American and Latin players, there's always been this type of disconnect. I mean I've seen it happen in teams."
Also speaking on the show, USWNT's Jessica McDonald said she is treated differently by officials on the pitch compared to her white teammates.
"It's sad that we have to carry ourselves in a different kind of way and act a different kind of way because if I get an attitude with the ref, he's quicker to throw up a card at me than one of my white teammates who would throw the same type of attitude towards him, it's more of a warning," McDonald said.
Several players in Germany have made statements with gestures during games or messages on their clothing since George Floyd died on May 25 after a white Minneapolis police officer pressed his knee for several minutes on his neck.
McKennie begins the segment by saying: "This has been going on for way to long. To the cops out there that continue to abuse their power, the world is watching now. Enough is enough."
ENOUGH IS ENOUGH ✊🏾✊🏾— Weston McKennie (@WMckennie) June 3, 2020
The time is NOW!! Not just for justice or change, but a SOLUTION!!! It has been going on way too long. This has been overlooked and belittled way too often! ENOUGH IS ENOUGH!!! pic.twitter.com/IqM18XjTga
The German soccer federation, said earlier on Wednesday it opposed punishing any players for on-field protests related to Floyd's death because it believes their anti-racism messages match the federation's own principles.
"The DFB has made a strong stand against any form of racism, discrimination or violence and stands for tolerance, openness and diversity, values which are also anchored in the DFB's statutes," federation president Fritz Keller said in a statement. "Therefore the players' actions have our respect and our understanding."
The statement named four players who protested during last weekend's games -- Dortmund's Achraf Hakimi, Jadon Sancho, McKennie and Borrussia Monchengladbach's Marcus Thuram -- but made clear the same approach would apply to any future protests.
The federation has not revoked a yellow card given to Sancho for removing his jersey after scoring a goal. The federation said on Monday that the Borussia Dortmund forward's booking was for the act of removing his shirt, rather than for the "Justice for George Floyd" message written on his undershirt during Sunday's 6-1 win over Paderborn.
Other players protested by kneeling, like Thuram, or by showing messages on an armband, like McKennie, or on boots, like Leipzig midfielder Tyler Adams. Only Sancho received a booking.
"Demonstrating against racism and police brutality is not political act. It's about human rights that should be a given," tweeted Steffen, who also took part in McKennie's "Enough is Enough" video.
Speaking on ESPN's Banter with Taylor Twellman, Steffen added that he felt safer in Germany than the U.S: "I do feel safer [in Germany] in regards to police brutality and being racially profiled. When I would walk past police or drive past them, I'd tell myself, you'd better watch yourself, you better wake up because anything can happen."
Germany's approach has the backing of FIFA. The governing body of world football said on Tuesday that such demonstrations "deserve an applause and not a punishment."
Hungary has taken a different approach. Their league gave a written reprimand to a player of African origin, Tokmac Nguen, who displayed a message in solidarity with Floyd after scoring a goal for Ferencvaros on Sunday.
UEFA, the governing body of European football, is also set to allow messages related to Floyd and anti-racism when the Champions League resumes.
Players are normally prohibited from espousing their views during a match. The laws of the game state that "any political, religious or personal slogans, statements or images" on equipment is forbidden.
Information from the Associated Press was used in this story.