On Sunday night, Ryback was fighting Kalisto for the U.S. Title (which he lost) and on Monday night he was being sent home from RAW and has, for now, been taken off television entirely.
The reason? According to PWInsider.com, the reason is a contract dispute. Ryback's contract is expiring sometime this summer and, so far, he and the WWE have not been able to come together on terms for a new deal. In the report, there is also one source claiming that it was Ryback himself that asked to be taken off television.
There is no word as to what the specific issues are with the contract dispute. Maybe Ryback wants the WWE to feed him more money? Or maybe it is something else entirely. But for now, you wont be seeing The Big Guy on TV.