Five infielders, five outfielders, and a full-time DH is not working. Mendoza doesn't like Baty up in key late-game situations against lefthanders. I could dispute that in general, but most importantly with regard to the roster, Carlos is using two guys, from an already short bench, to replace one. They send Taylor up for Baty and then put in Wendle. So you lose Baty in the seventh or eighth, you take your best reserve outfielder's glove out of the game, you take your best reserve baserunner's legs out of the game, and then maybe you get Wendle up in a game situation in the ninth or tenth, in this case against an even tougher lefty that he couldn't even bunt to a wide-open right side against. I like Taylor, but had that been Vientos on the roster instead of him, Mark gets the pinch-hit assignment, and if he doesn't come through then, he gets another crack in the 10th against Alvarado, instead of the pile of lefties we were sending up there, trying to swing with the ball coming at them from behind their right ears. If they have Vientos and Taylor, they have the first one up instead of Wendle in the 10th, and the second one available to pinch-run. A much stronger look. So yeah, this roster needs Vientos, but JD Martinez and DJ Stewart and Tyrone Taylor (despite Mendoza's neglect) have all justified their presence with their bats as well as anybody. The ones who aren't justifying their presence right now — Joey Wendle and the apparently doghoused Omar Narváez — are the lone backup at positions that nobody else plays. I'd say that the answer is bagging the five-man rotation, but that would almost certainly mean they add another reliever because that's what teams do, so I don't know what the answer is, but I think maybe they should call up Vientos, but dress him in the uniform of whoever yesterday's starting pitcher was. That way he can be on the roster, doing his thing, but nobody will know it's him!