The article mentions internal candidates such as Franklin Morales and Alfredo Aceves, but with both being question marks it may make sense for Boston to add other options for depth. The team is also relying on pitchers coming back from injury, and may want to bolster their depth in any way possible.
The team struggled last year, but after a few major moves they should be in the hunt this year. It would be unfortunate to see them struggle because of a lack of pitching depth, which is an issue that many teams face. No word yet on specific targets for the team.