Blue Jays starting pitcher R.A. Dickey is optimistic that there will be no residual effects of the lower back discomfort that forced him to leave his last assignment when he throws Tuesday against the Baltimore Orioles.

Dickey gave up zero runs on two hits and a walk over six innings against the Chicago White Sox last Thursday, but had to give in to the muscular pain.

"Hopefully it's behind us," he said on Monday. "We've given it enough rest and enough treatment that I'm optimistic.

"I backed off the bullpen this week. I just played catch on the side to give it as much time to heal as possible and it has responded well to that, so I don't feel like there is going to be a setback."

Dickey said his back had been more of a concern in between his start at Kansas City and the game against Chicago than it is prior to this one in Baltimore.

"It was just a progressive thing," said Dickey. "Getting up, sitting down, heating up, cooling down, heating up, cooling down ... it just tightened up. I could have kept going another inning but it didn't make any sense if I wanted to get to this place where I could make my next start at full capacity."

Manager John Gibbons said the staff will be carefully monitoring Dickey in the early innings Tuesday but he felt confident that the knuckleballer was in a good place.

"I pitched last year with a torn abdomen that I pitched the whole year with," Dickey said. "The year before that I had a torn plantar fascia. It's just part of getting older and being able to juggle it all."