Well, it was something that we talked about on here and I've seen elsewhere (SoxProspects, Over the Monster, etc.).
Earlier Friday evening, the Red Sox made a minor trade — a theme of the last few weeks for them — acquiring left-handed pitcher Matt Hall from the Tigers in exchange for minor-league catcher Jhon Nuñez. At the time of the deal, they had not announced what the corresponding roster move would be to make room for Hall on the 40-man roster. Now we know. The Red Sox announced they have designated Travis Lakins for assignment. They now have ten days to either trade him or move him through waivers to try and keep him as a depth option.
There are other pitchers who I would have designated ahead of him, like Hector Velázquez, Ryan Weber or Chris Mazza. All of them could serve as rotation depth, however, and the Red Sox both don’t have a lot of that while also boasting a rotation with plenty of injury risk.
In terms of the three guys mentioned above, Velazquez was eventually DFA'd and Mazza struggled as a starter, but has pitched rather well in a SSS out of the pen.