Johnson has been diagnosed with inflammation in his lower hamstring area, but was in the Blue Jays' lineup for the series opener against Texas and is not expected need more than an occasional day off to stay healthy.
"It's probably more monitoring," manager John Farrell said. "He did have an MRI today, he was examined by the doctor here, conferred with our own doctors and they don't feel like this is something that is going to grow into something further.
"He has some inflammation around one of the tendons in the lower part of his hamstring. So we'll monitor it, but we don't feel like we're putting him in jeopardy in any way."
Johnson is expected to receive the day off on Saturday afternoon, but should be back in the lineup the following day. In 22 games this month, the veteran second baseman has reached base safely in 21 of those contests.
The 30-year-old is hitting .250 with eight home runs and 23 RBIs in 43 games.