Tazawa threw a simulated game Tuesday, Jason Mastrodonato of the Boston Herald reports.

EDGE Analysis

After his latest workout, the expectation is that Tazawa will be activated Friday. Before the All-Star break, Tazawa had been serving as one of Boston's primary setup men, as he'd picked up a team-high 14 holds. He'd also been a solid source of strikeouts, striking out 29 percent of the batters he faced.