"I used to throw and slider and I've been picking it back up so I have a curveball and a slider. I don't really throw a changeup too much, so it's really sinker, slider, and curveball."
Marze has been used regularly out of the bullpen all season and has 71.2 innings under his belt so far this season, but he still says that his arm has held up surprisingly well.
It appears he prepared well for the season, but Marze couldn't have prepared for an overhaul of his delivery on the fly this season.
"Dayton is a guy with a good fastball that has some movement to it," Lansing Manager Mike Redmond said. "Vinny has helped him with his delivery changing it around. He's spent his last few outings working out a new delivery, which is looking good and seems to be working.
[It] could be a great sign for him as what it really does is allows him to be more consistent and more consistent with his fastball. He's got a breaking ball, it's a pretty good curveball. He's got a chance with a good arm, we just need to get him more consistent, eliminate the walks, and get him pounding the zone."
Marze talked about the change in his delivery and how it allows him to get more downward sink on his pitches.
"I used to throw all the way on the left side of the rubber and sort of coil up with my delivery with my back and hip facing the plate," he said. "Now I'm seventeen inches over on the other side of the rubber and I'm trying to stay more straight up and down going to the plate.
"Just trying to stay a little taller and instead of turning my shoulders and coming across the ball and getting kind of a sweeping motion to my sinker I'm more head to toe and it's more of a deep sink straight down. So, I'm getting more downward angle on the ball than side to side."
Pitching coach Vince Horsman was the driving force behind the mechanical alterations in Marze's delivery.
"I just turned Dayton into a little more of a conventional guy," Horsman said. "He was having trouble getting the ball down. He has a good arm, he can get it anywhere up to 95 mph, but it was up and it was flat and his command wasn't very good. So, I just felt that a change was in order and just to help him get the ball down in the strike zone.
"The kid has a good arm, a major league arm, but with the issues of his command and pitching up in the zone he really wasn't enjoying any success. Then, I made a phone call, voiced my concern and was given the go-ahead to alter his mechanics and since then he's still feeling it out.
"The results have been there, though, he [had ten] shutout innings since we made the changes and it's also the way he's getting outs. It's a work in progress, but he seems to be making progress and I'm pleased with the way it's been going so far."
Marze acknowledged that there was some uncertainty about the change initially, but said he trusts his coaches.
"He's the pitching coach and he sees what he sees, he's been around longer and I trust those guys that are my elders and higher up," he said. "They aren't trying to hurt me, they just try to do what's best for me so I appreciate it.
"I just need to get comfortable with it. As of right now, I'm doing pretty well. I mean, I have my days where it gets frustrating but as long as I work through it I'm pretty sure they know what's best and I'll get going with it."
Marze talked about some of the problems he was having with his old delivery.
"I always could work both sides of the plate," he said. "My problem was leaving the ball up and it flattening out or having side to side run instead of what we really want which is downward sink. Now I keep the ball down a bit more consistently. I think it's working out a little better."
Marze's goal for the rest of the season is to stay consistent and keep hitters off-balance.
"Consistency with my fastball and just throwing with the new delivery," he said. "I'll also be working on my breaking stuff because of course if you can mix and match, then your fastball doesn't have to be as good or you don't have to lean on it as much if they aren't sitting on it."
His manager looks for Marze to take off now with his new delivery.
"He's got a good fastball, and he has a good arm," Redmond said. "What he needs to work on is his consistent delivery and with that comes throwing strikes.
"I could probably say that about every guy, not just on our team but in this league. But, Vinny, has done a great job teaching them and showing them how to repeat a delivery and get out there and throw strikes."