Thornton, 37, had a 3.52 ERA and 1.76 WHIP in 15 1/3 innings for Boston after being acquired from the White Sox at the trade deadline. He held left-handed batters to a .235/.267/.370 batting line overall this year but was left off the Red Sox's postseason roster in all three rounds.
Once one of the very best relievers in all of baseball, Thornton's performance has slipped in recent years, which isn't very surprising given his age. Here are some troubling trends:
|2010-13 Matt Thornton|
|Season||Fastball Velocity (mph)||Strikeout Rate (K/9)||Swing-and-Miss Rate|
Given his name value and the fact that left-handed relievers are always in high demand, Thornton should have no trouble finding a new team this winter.