The club has yet to announce who'll be starting against the Edmonton Eskimos at Mosaic Stadium (4 p.m. ET).
The 41-year-old Joesph, who led the Riders to the CFL championship in 2007, was brought back from retirement earlier this month.
The Riders have been struggling since lead quarterback Darian Durant injured his arm at the Banjo Bowl in Winnipeg.
Since then, backups Tino Sunseri and Seth Doege have led the team, with inconsistent results.
Now, it appears to be Joseph's turn.
"I know my body feels good," Joseph told reporters on Thursday. "OK, I might not be as fast as I was in '07, but I think my arm is still as lively as back then."
Joseph, who was cut from Edmonton at the end of the last season, said the game again the Eskimos has special meaning for him.
"If I didn't say I had a little chip on my shoulder, I'd be lying to you," he said. "I want to use it to help this team any way possible."
So what do you think? We want to hear Your Say.
On mobile? Here's a link to our Kerry Joseph poll.