Johnson (elbow) is scheduled to throw at Fenway Park on Saturday, aAlex Speier of The Boston Globe reports.
Johnson completed a one-inning simulated game Tuesday and played catch Friday and had no apparent issues with his elbow. The 28-year-old could throw a simulated game Saturday, but there's yet to be a final determination of the specifics for his throwing session. If all goes well the team will then make a decision about a potential rehab assignment.