W/r/t Rendon, if you have a nagging muscle that you can still play with, then taking the only 4 days period you can give it a good rest in the hope it stops nagging makes a lot more sense than plane flights, interviews, doing warm ups, and possibly diving defensive or running hard on a hit.
OK, if someone is nursing nagging injuries then missing the ASG makes sense. But if the player is healthy, I say man up and do it for the fans.