Horrifying moment in the Marlins vs. Reds game Thursday morning ... Miami pitcher Daniel Castano was drilled in the head by a 104 MPH line drive, but somehow, he appears to be OK.
The terrifying scene just happened in the bottom of the first inning at Great American Ball Park in Cincinnati ... when Castano threw a slider to Donovan Solano.
The Reds third baseman smacked the ball violently ... and it made a beeline straight for Castano's face.
Thankfully, Castano was able to turn away enough to avoid getting hit near the eye area -- and the ball popped off his head and his teammate was able to record the out.