The professor in The Flash is the man in yellow, which can be seen from the ninth episode of the first season. Then why was he beaten by the man in yellow? Does the injury look fake?

In the flash, the person wearing yellow clothes is not the professor himself, but a flash from the future, that is, barry allen. The professor was beaten in season 1 episode 9 because he was trapped by lightning and couldn't escape. Anti-lightning is a criminal who travels through time. He used his speed and skills against the Flash, trying to destroy the Flash's world.

In that scene, reverse lightning trapped the professor through the power of rapid force, making him unable to escape. Although the professor knows how to relieve the attack of reverse lightning, he needs time to implement it, and reverse lightning has been attacking him in the process. Therefore, the professor was injured by lightning.

As for why the Lightspeed Man in yellow appeared in the ninth episode of the first season, it was because he came from barry allen in the future, and his purpose was to help barry allen and his team fight against lightning and other threats. The man in yellow has mastered the ability to control the speed of light in future time and space, so he can show amazing speed and strength in the play.