http://www.espn.com/mlb/story/_/id/2...ter-thing-past says:

"Hitting, 2009 To 2019, By Velocity
VELO BA OBP SLG K% BB%
< 84 .230 .283 .370 25.7% 6.2%
84 to 86 .232 .281 .375 25.0% 5.8%
87 to 89 .265 .328 .428 17.5% 7.7%
90 to 92 .282 .357 .455 14.0% 9.6%
93 to 95 .265 .345 .417 18.3% 10.1%
96 to 98 .236 .314 .355 24.8% 9.5%
99 to 101 .205 .286 .282 33.4% 9.5%
102+ .118 .186 .155 49.5% 6.4%
Source: TruMedia"

I plan on doing some linear regression with those numbers.