2. Blake Snell
Last month, Blake Snell became only the seventh player to win a Cy Young Award in both the American League and National League. Snell received 28 of 30 first-place votes after a dominant season in San Diego. He captured his first Cy Young in 2018 with the Tampa Bay Rays.
Boston was 20th in team ERA last season, and 24th in hits per nine innings (8.9). Snell led the MLB in both of those categories with a 2.25 ERA and 5.8 hits per nine innings. He should provide an immediate injection of talent in the Red Sox rotation.
Sean McAdam has reported that Boston has "expressed an interest" in Snell, while acknowledging that it is unclear exactly what that entails. Pete Abraham has also tagged the southpaw as a potential Red Sox target, pointing to Snell's high strikeout numbers and his ability to be the workhorse of a rotation. He made 32 starts last season, and went five or more innings in 29 of them. In 20 starts, he gave San Diego at least six innings. According to Abraham, the Red Sox want their starters to go deep into games, Snell has definitely shown he can give them that.
Snell may patiently wait for Yoshinobu Yamamoto to set the pitching market, per Jon Heyman, so it wouldn't be surprising if he holds off until the Yamamoto domino falls.
Snell turned 31 today, so he should have a few years left of his prime. Rumors have been aplenty that he "badly" wants to return to his hometown Mariners, but that will obviously require mutual interest from Seattle.