The Boston Red Sox decided in the 2016 season to move Joe Kelly to the bullpen and in this 2018 campaign, and the pitcher has been a key player in the bullpen of the team.
Joe Kelly had a good 2017, but what he has done in this campaign has exceeded all expectations. After forcing a key out in Tuesday's victory, manager Alex Cora explained to MLB.com's Ian Browne, how Kelly has been in his best version during this campaign.
This is a different Joe Kelly. We can throw the numbers out of the window. This is a very different Slider. Change. Straight up. I do not really go through the confrontation with the numbers. I just continue the confrontation with your material, and right now, your material is very high. If we talk about relievers, he is very high. Your things are up there. He is one of the best.
Kelly had a difficult start to the season, allowing 4 runs and only taking one out. Since then he has only admitted one run for a 0.35 ERA in 24.1 innings. Joe Kelly gladly said about his improvement:
I feel good, not only with the mix, but I feel good with my mechanics, so that ends up being able to throw fast pitches to attack. I'm trying not to let the batters sit on the 'fastball predictability' as much as I can and work from there.