Came across this today, so I thought I would share.
http://www.revfire.com/files/2009_NFCA_Showcase_RevFire_Spin_Performance.pdf
For drop balls, the average pitcher threw with 17 RPS, the top 10% threw at 22 RPS, and top 5% threw with 24+ RPS.
For curve balls, the average pitcher was at 18 RPS, the top 10% threw at 24 RPS, the top 5% threw with 27+ RPS.
For screw balls, the average was 18 RPS, the top 10% threw at 24RPS, while the top 5% threw with 25+ RPS.
For rise balls, the average was 19 RPS, the top 10% threw at 24 RPS, while the top 5% threw with 26 RPS.
http://www.revfire.com/files/2009_NFCA_Showcase_RevFire_Spin_Performance.pdf
For drop balls, the average pitcher threw with 17 RPS, the top 10% threw at 22 RPS, and top 5% threw with 24+ RPS.
For curve balls, the average pitcher was at 18 RPS, the top 10% threw at 24 RPS, the top 5% threw with 27+ RPS.
For screw balls, the average was 18 RPS, the top 10% threw at 24RPS, while the top 5% threw with 25+ RPS.
For rise balls, the average was 19 RPS, the top 10% threw at 24 RPS, while the top 5% threw with 26 RPS.