1. Lance Lynn
In my opinion, Lance Lynn is the number one option on the list, and it is not even close.
Sure, the price is going to be steep to get Lynn. He is likely going to cost somewhere in the neighborhood of $17-$19 million, but the Sox could make room if they have to.
Drew Pomeranz is coming off the best season of his career and is a value at his current contract. The Sox would have no problem moving him, and picking up a mid-level prospect for him, freeing up the money they would owe him.
Then the Sox could afford to get Lynn, meaning a rotation of Chris Sale, David Price, and Lynn. That would be tough to match in a five-game series.
Lynn is coming off of an 11-8 season, in which he had a 3.43 ERA. He is only thirty years old right now and has had five straight seasons of double-digit wins. Lynn also was a top-20 pitcher in the majors in WPA. He is the best pitcher on the market this off-season behind only Jake Arrieta and Yu Darvish.
The best thing about Lynn is the postseason stats.
Lynn has appeared in an incredible 24 postseason games, making seven starts. He has a 5-4 record with a 4.50 ERA. He has pitched in the World Series twice, including against your very own Boston Red Sox in 2013.
If the Sox are truly going all-in for next season, they should look at Lance Lynn. He will bring a calmness to the rotation in October. Lynn will be asking for a lot, but the Sox should be willing to pay it to win.