Here's something "fun" to read while watching this game. Not sure which is more cringe worthy though:
https://www.foxnews.com/health/teen-usb-cable-penis-length
That is absolutely the reason. Borucki was brought up to give them a 2nd lefty. It makes sense from that point of view for him not to be used tonight. I don't necessarily like it, but I can see the thought process.