Complex sentence: When Burkhart turned around and saw Carbo well out of the baseline and not near the plate and that Hendricks had the ball in his hand, he signaled Carbo out without asking for help from the other umpires.
Split into simpler sentences: When Burkhart turned around, he saw Carbo well out of the baseline and not near the plate while Hendricks had the ball in his hand. Burkhart signaled Carbo out without asking for help from the other umpires.