https://blogs.fangraphs.com/mookie-betts-stephen-strasburg-and-2021s-most-irreplaceable-players/ There was a good segment on Hit and Run, guest hosted by Chris Rongey with the person who invented ZIPS on Fangraphs, Jeff Szymborski, I can see an argument also for Tim Anderson, as the Sox went through their worst stretches to date the past two seasons with him on the IL, but Robert would be very tough to replace, especially defensively, if out for an extended period. The list was objecti