There's one unflinching constant of MLB free agency: Pitchers are paid a premium on the open market despite the frailty of their position. The rising supply of sluggers may only increase the demand for serviceable hurlers, even if every available one comes with glaring warning signs.
Reliable stalwarts have derailed their value with disappointing 2017 campaigns. Even All-Stars Jason Vargas and Greg Holland have turned career years into giant question marks due to catastrophic second halves.
And no pitcher's name will be mentioned more in this list than Tommy John. Three of the top five pitchers available this winter underwent the arm surgery in 2015.