Also think Rachel Garcia from UCLA could hit 70. Paige Lowary (Mizzou/OK) also hit 70+ and Gasso regularly used her as a closer in 2018(?) and pulled her LF into the IF because they figured no one would pull the ball against her.
I watched Garcia pitch all summer from directly behind home plate. In-house radar gun (which is set up slightly off-center) had her consistently 69-72. No idea if that's what ESPN uses for the broadcast.