My guess is it may be difficult to control and be effective just dialing it up 1-3 times a game, and the increased risk of doing so at all is not worth the incremental gain of using it 1-3 times. Or at least that is how he and his people view the risk. Exactly, it's the reps in side sessions and working on mechanics that makes the pitch consistent. If you're concerned with injury, you're not going to dial it up in side sessions or games throughout the season and perhaps that's been happening more frequently of late to get dialed up for the postseason. Really though, who knows?