my 1st year at BHQ and i am trying to understand how this change in projections could happen.

The projected saves for Todd Jones and F Rodney have changed dramatically from May 12 to May 19.

Jones from 25 to 13
Rodney from 6 to 13

I have not read anything to suggest their roles will change and Jones has 3 saves this week. I know Jones is iffy but what triggered this change to save projections?