If it was a late change then surely there was a logical explanation. If that was a rhetorical 'Why' (looks up to God) then I agree we could do with a bit of luck atm.
Would have to be due to a injury. I did notice he spent a lot of time on the bench in the last 1/4 against Freo. Hopefully just general soreness and not a reoccurence of his groin injury from last year.