I am watching the Louisville-Kentucky game right now, and watching the pitch speeds being posted by Chelsea Leonard, the closer for Louisville. I have not seen her throw a pitch yet in the 60s. Her top speed seems to be 58, and she's throwing a lot of pitches with speed that starts with a 4. On TV they said she had the most saves in the country.
Interesting, isn't it? We always hear that you can't pitch D1 unless you're in the mid-60s. I guess it depends on where you go and what else you can do.