Oh absolutely. This is a very open secret in show business.
Back when Sylvester Stallone was [promoting Creed on the late night circuit, he claimed that Michael B. Jordan got knocked out for real on set by Tony Bellew. The crowd ate it up.
Now, Creed was a great movie. As a lifelong boxing fan, I was surprised by how authentic a lot of it felt, like grounding the romanticism of boxing with its realities (broken hands, brain damage, crushing poverty). The fake HBO promos in the film looked like the real deal. There were a bunch of great cameos in there too, like Stitch Duran, Andre Ward, Gabriel Rosado, and a guy who looks suspiciously similar to Roger Mayweather.
But there is absolutely no way that Michael B. Jordan actually got knocked out on a professional Hollywood set. What major movie studio is thinking, “Hey, let’s allow our A-list starring actor to risk a concussion on set so he could bring our 35 million dollar production to a grinding halt. In fact, let’s also waste millions of dollars on insurance for a boxing movie with no stunts so Michael B. Jordan can’t sue us and Tony Bellew into the Stone Age after he takes a heavyweight knockout punch right to the face.”