See Twins or Indians in the post-season since 2016, or Sox last year...when you’re not tested very much in your own division (see NL West, AL East for the opposite), it makes it a lot more challenging when the playoffs hit.
You can’t survive all the little focus/fundamentals mistakes....not holding baserunners or throwing them out, throwing to the wrong bases from the outfield or missing cutoff men, giving away outs, missed double plays, etc.
This week will be an interesting barometer of how good they can play without three starters in the lineup against more seasoned, veteran teams with more playoff experience during the last five years.