[ noun ] (baseball) a pitch thrown with maximum velocity
"he swung late on the fastball" "he showed batters nothing but smoke"
Used in print(Samuel Elkin, "The Ball Player," Nugget, 6: 5...)
The new Riverside pitcher turned_out to have an overhand fast_ball that took a hop .
In the last of the sixth inning Mike_Deegan got_up to bat and hit a fast_ball over the left_fielder 's head .