As a very rough proxy, in Brooks’ career his range factor per 9 innings was 3.20 and league average was 3.09. In Adrian Beltre’s career, he averaged 2.78 and league average was 2.67. The .42 difference in league average equates to about 68 fewer chances per season. But interestingly, the low point in league RF/9 during Beltre’s career was 2.23 in 2013. It rebounded significantly after that, even though strikeouts were rising. That’s a tough one to explain.