If you're using the app you won't find much. But on the website go to Reports->Probable Pitchers to see the next week's worth of starting pitchers. Reports->Top Players has everything you should need on free agent stats. The Waiver Claim page and Add/Drop page also show free agent stats sliced a number of different ways.
BIgAJC wrote: This is the worse website to see free agent stats or when players particularly pitchers when they pitch next. Unless I’m missing something and not finding it
Rotate for more data.