"Concerned? No," Sveum said Tuesday. "Breaking balls like his aren't going to do a lot down here in Arizona. You're always going to struggle with it and you're going to try to throw harder and make it spin more. It's actually a counter-effect. His fastball command is the biggest thing. We know the breaking ball will come back when we get up north. It's just getting the fastball and getting work."
Marmol didn't take Monday's outing against the Reds as well. There was an overturned garbage can in the clubhouse as a result.
What the Cubs want Marmol to do is be able to make adjustments to correct himself when his mechanics are out of whack.
"We've got to be able to do that out on the mound when the first pitch of the inning, I fly right open and the ball goes up and away and I have to be able to go back on the mound and make that adjustment," Sveum said, putting himself in the right-hander's shoes. "He knows the adjustments that have to be made. We have to slow it down and be able to do it on the mound."
There isn't a problem with Marmol's work habits.
"It's a confidence thing," Sveum said. "Don't try to crank the breaking ball -- it's not going to work in Arizona. There's no air here, nobody's breaking balls break here. That's why you see a lot of 15-14 games. It's all the fastballs and all the breaking balls that don't break that much. You just have to be careful to not get frustrated about that."