Sims (lat) walked two and recorded a strikeout in one-third of an inning in his first rehab appearance with Triple-A Worcester on Sunday.
Sims is three weeks removed from going on the 15-day injured list with a right lat strain, but he's ramping up in the minors and could be ready to rejoin the Boston bullpen by the end of the week. The right-hander has struggled with Boston since being acquired at the trade deadline, allowing nine runs with a 7:7 K:BB over 10 innings.