According to a tweet from MLB Network Insider Jon Heyman, free agent relievers Adam Ottavino and David Robertson are believed to be high on the Boston Red Sox list of back-end relief options.
Both are at the top of the list of available reliever options on the free agent market, and they are likely to be courted by plenty of teams before finalizing a deal.
After resigning free agents Nathan Eovaldi and Steve Pearce, it is also likely that Boston could work out deals with Craig Kimbrel and Joe Kelly, as Heyman also reports is a possibility.