Scary scene on the baseball diamond on Monday ... Twins left fielder Nick Gordon appeared to be knocked unconscious after he collided with his teammate in the outfield.
The terrifying moment happened during Minnesota's spring training game against the Boston Red Sox ... when Gordon and center fielder Max Kepler went after a fly ball at the same time.
The two Twins ended up crashing into each other before the ball dropped out of the sky -- and you can see in a clip of the play, Gordon got the worst of the collision.