Jones is arguably the Sox's best reliever, so this is a big loss. The right-hander was one of the top setup men in the game last season, when he went 5-3 with a 2.71 ERA, 0.892 WHIP and 80 strikeouts over 70.2 innings covering 71 appearances.
The elbow injury, which required nerve repositioning surgery (!?), limited Jones to 11 appearances this season. He hasn't pitched since April 28.
This makes three relief pitchers from the 2015-16 Sox bullpen who are out for the season after elbow surgeries. Zach Putnam and Zach Duke, who is now with the St. Louis Cardinals organization, are the other two. A fourth reliever, Jake Petricka, is on the disabled list with a strained right elbow. I hate to speculate, but I will anyway: You can't help but wonder if Petricka is the next guy on his way to the operating table.
I never agreed with the way former Sox manager Robin Ventura used his bullpen. He was beholden to lefty-righty matchups. He ran his guys into the ground, sometimes using four or five relievers just to get through one inning.
I don't think it's a coincidence that these four men are experiencing elbow problems right now.