BPF is the Bat Performance Factor. When a bat is tested, it is fixed in a stationery position. A ball is launched at a high speed towards the barrel of the bat. When the ball bounces off of the bat, the speed is recorded to find out how much faster it goes when it comes off of the bat. That is how the BPF is calculated.
If the ball comes off of the bat at the same speed, the BPF is 1.00
If the ball comes off of the bat 20% faster, the BPF is 1.20
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