Josh Johnson is confident that the discomfort he's feeling in the triceps muscle in his right arm is not serious.

"After last start it was pretty sore and we just waited on it, did what we could do to make it better but it just stayed the same," said the Blue Jays starter.

"We decided to just play it smart and make sure I'm not out for an extended period of time and just knock it out right now."

After it was decided to replace him with Aaron Laffey for the game at Yankee Stadium on Friday, Johnson went for an MRI to confirm the diagnosis of the training and medical staff.

"I've been on the other side of this before, when I was supposed to be out a couple of weeks and it ends up being five months, but this isn't anything like that," Johnson said.

DECISION TIME

R.A. Dickey is in a similar spot to Johnson, nursing a condition in his upper back and neck that has been uncomfortable in his last two starts, but not bad enough to force him out of a start.

The Jays staff is monitoring Dickey in advance of his scheduled start Sunday against the Yankees.

"We're going to have to look at things after the game (Friday night) and make some decisions," Blue Jays manager John Gibbons said. "We think R.A. is going to make his start. It's just like he was before his last start. We'll sure be able to use that off-day (Monday). Probably could have used it last week."