When is James Shields's Next Start?

[Walden warriors]

He pitched Tuesday the 28th in a hard luck loss to Texas. Four days of rest means he'd pitch again on Sunday against the Jays. My fantasy site says he's the probably starter for Monday. The Rays have not had an off-day since.

Anyone know if the Rays are using a 6-man rotation and Shields really is scheduled for Monday, or if my fantasy site is wrong and he's probably going Sunday?

Thanks!

[fast dogs]

Niemans Saturday spot start pushed Shields back to Monday; Niemans injury ends the 6 man talk