If they bring Casas up, they'll need to keep someone there as a platoon partner. It would be terrible for him and the team to allow him to face MLB left handed pitchers at this point.
Of course, if they do that, then it slows his development against lefties if he's going to go the rest of this year not facing them. The only place he can "safely" get experience against lefties is in the minors.
I mean, right now, the Sox have SEVEN regulars (out of 10 regulars) that have an ops+ figure of 65 or below:
Vazquez: 65
Dalbec: 29
Story: 59
Verdugo: 65
Hernandez: 56
Bradley: 63
Arroyo: 60
Add in Plawecki as the backup catcher, who is at a stunning -15 ops+, and sure throw in Cordero who is here to "improve" the lineup, I guess, and he's sporting an ops+ of 53.
*If we add in Shaw, Arauz, and Wong - the next 3 on the list, who have a combined 35 PA among them, their ops+ numbers are.... -100, -100, and -10, having gone a combined 1-32 (.031) with 0 bb and 3 sacrifices (one bunt, two SF).
So of their top 12 position players by # of plate appearances, only *3* of them have ops+ numbers HIGHER THAN 65.
Their top 3 players have 334 PA among them, and of that group they have 99 hits in 313 AB (.316) with 9 homers and 35 rbi. Their next 12 guys have 722 PA among them, and of that group they have 118 hits in 649 AB (.182) with 7 homers and 57 rbi.
So 3 guys: 334 PA, 313 AB, 99 hits, 9 hr, 35 rbi, .316 avg
Next 12 guys: 722 PA, 649 AB, 118 hits, 7 hr, 57 rbi, .182 avg
That is unconscionably, unfathomably bad. Incomprehensibly bad.