https://www.overthemonster.com/2018/3/30/17178324/red-sox-alex-cora-managerial-decisions-joe-kelly-craig-kimbrel-carson-smith
It obviously didn’t go well, but I’m not sure you can put that on Cora for calling upon the righty at all. It was a four-run game, the Rays hadn’t done anything on offense all day, and Tampa had their bottom two hitters and Matt Duffy coming up. This wasn’t a tremendously high-leverage situation, and Kelly is at worst the fourth-best reliever in a bullpen that already used their third-best. Simply put, it’s a situation in which Kelly needs to come through, and he simply didn’t.
Cora allowed Kelly to face five batters in this game, and that was a mistake. It was pretty clear from the start that Kelly couldn’t locate his pitches in this outing, and while the umpire was squeezing him the control was a bigger issue than the strike zone. We know by now that Kelly has a tendency to lose the zone at times, and Cora needs to learn to be more proactive when this is the case. Ideally he would have been removed after the Duffy double, but he certainly should have been lifted after he walked Kiermaier.
Next, we have Cora going to Smith rather than going to Bobby Poyner with the left-handed Miller coming up. The manager’s reasoning for this was that it would have been too big of a spot for Poyner to make his major-league debut, and it’s a fair point. However, it does lead one to wonder why he was warming in the first place. I suppose it wouldn’t have been as bad if Kelly had gotten Carlos Gomez out, leaving two on in a three-run game with two outs against Miller compared to bases loaded and one out. It’s also fair to wonder why you’d put Poyner on the major-league roster in the first place if he’s not ready for this kind of outing, but that’s also not entirely on Cora. I think it probably would have been fine to go with Poyner, but at the same time Smith is a groundball machine who has never shown big platoon splits. He should be able to handle that spot, and arguably was a better choice than Poyner even if you don’t worry about the latter being ready for his major-league debut.
The biggest criticism of Cora, though, was not bringing Kimbrel in at all for the eighth inning. One of the Red Sox manager’s biggest talking points this winter has been a more aggressive usage of his closer and not being afraid to use Kimbrel before the ninth inning. However, according to Cora after the game, he and the Red Sox closer talked before the game and decided he would only pitch in a clean inning for Opening Day. That’s a bit strange, but once he and Kimbrel talked about it I’m fine not going back on that decision. Communication is key between relievers and a manager, and Cora needs to earn trust early in the year.
As for the decision to only use Kimbrel in a clean inning, Cora insists that this won’t be the case all year but only early on.