Over the weekend, Boston Red Sox closer Koji Uehara suffered a non-displaced fracture in his right wrist and he will miss the rest of the season. Usually in these types of situations where a team makes a voluntary switch at closer or if their closer suffers an injury that is severe enough to land him on the DL, the team will hand closing duties over to their primary 8th inning guy.
For the Red Sox, it’s been Junichi Tazawa who has been working that 8th inning, and he’s done his best Uehara impression this season as a fly ball pitcher that induces a lot of weak infield flies and maintains a strikeout per inning with exceptional control. Overall this season, Tazawa has a 3.19 ERA, 1.10 WHIP, and 48 K/7 BB in 48 IP, and the Japanese import has been very functional for the Red Sox in a relief role since 2012.
However, Red Sox manager Jon Farrell is reportedly content with keeping Tazawa in a setup role and will not (at least for now) be the man to close out the majority of games for the team. Tazawa doesn’t have egregious lefty/righty splits in his career, but lefties are hitting .276/.295/.421 against him this season while righties are hitting .227/.267/.364. So perhaps Farrell is hesitant that he wouldn’t succeed when big bopping lefties are to scheduled face him in a save opportunity. Keeping him in a setup role, Farrell would have more control over utilizing him against the types of batters that he wants to. Last year when Uehara hit the DL, Tazawa was also passed up for save opportunities in favor of Edward Mujica.
The Red Sox plan to use Jean Machi as their primary closer for the time being. Machi recently joined the Red Sox after they claimed him off waivers from the Giants in late July. Machi debuted in the Majors in 2012 and has been a mainstay as a Major Leaguer since 2013 where he was a solid middle reliever for the Giants. However, for the Giants this season, Machi had a 5.14 ERA, 1.49 WHIP, and 22 K/14 BB in 35 IP.
Machi has past closing experience in the Minors, but he’s never had the look of a prototypical closer with his lack of strikeout potential. So it is surprising that the Red Sox are so willing to install one team’s sloppy seconds as their new closer when they seemingly have a more viable option that has been with them for years in Tazawa. Considering that there are more right-handed bats than left-handed in the league, and that righties have hurt Machi a lot more this year (.343/.400/.606 vs. righties, .105/.219/.143 vs. lefties) and throughout his career (.244/.303/.396 vs. righties, .196/.259/.308 vs. lefties), it makes the move to turn to Machi even more curious.
Given Machi’s current form and the profile that we have on him from past performance in both the Majors and Minors, Machi could end up struggling in the role as closer and it wouldn’t be a surprise to see him not last in the 9th inning for the remainder of the season. He is the guy to own for now, but a close eye should be kept on Tazawa as he probably would have more likelihood of getting the job done.
Let’s take a look at what else happened on Monday now.