Nine of Twelve made this observation that interested me.
I'll make this observation. It's rare for a team to have a significant postseason run with no left handed starting pitcher. It would not surprise me to see the front office trade for one if the team looks strong during the month of July.
It is clearly rare to make a significant postseason run without a left handed starting pitcher. I am guessing it is also rare to finish outside of the playoffs without a left handed starting pitcher. Are teams without left handed starters less likely to make the playoffs?
In the 2000s, three teams have made it to the world series without a left handed starter (each had one spot start in the season by a lefty).There have 18 such regular season teams with 0 or 1 left handed starts over the season in that time span. Making it through the season without anything more than a single spot start by a lefty is rare. It doesn't appear to make it less likely that a team will advance to the world series (3 in 18 is better than 2 in 30),
The Twins need to go with their best starters regardless of whether they are left handed or right handed. It didn't stop the 2004 Red Sox, 2004 Cardinals or 2016 Indians from advancing to the world series. It won't be the reason that keeps the Twins out either.