It's official now but managers will still have the option of doing it the old-fashioned way by throwing four pitches. So if they need to buy some time - which is often the case - they'll just do it like they do now, saving zero time. Good work, MLB!
Maureen Mullen @MaureenaMullen · 32m32 minutes ago
Re new MLB rules: am told mgrs have OPTION of throwing 4 pitches for IBB or not. So, if they need to buy some time, throw 4.