Weight Loss Proves to Be Pivotal for Wyatt Mathisen During All-Star Campaign

ALTOONA, Pa. – His official listed weight on MiLB.com is 227 pounds. In the Altoona Curve game notes that media receives, he is listed at 241 pounds. Fortunately for the Curve — and the Pirates’ organization as a whole — that number is nowhere close to what Wyatt Mathisen now weighs in at for his fifth professional season.

Mathisen played shortstop and pitched while in high school; however, he was rated as the top prep catcher in the 2012 draft by Baseball America was taken in the second round by the Pirates. Plagued by injuries throughout his professional career, he officially made the move to third base before the 2014 campaign. He had trouble fielding that year, but he showed some improvements in 2015. Last year, he again missed a huge chunk of time due to injury.

One way to address injury concerns for an overweight player is easy… lose weight. Mathisen did just that, losing 40-45 pounds over this past offseason. He attributes the weight loss to a complete overhaul of his diet.

“I stopped eating carbs,” Mathisen said. “I have 55-60 carbs a day, max. I eat some in the morning to get me through the day, then I just eat meat and vegetables. That’s it. I cut my carbs and cut my sugar count down a lot.”

The dropped poundage allowed Mathisen to work out more during the week. Training with a personal trainer in Corpus Christi, TX, he said that the diet helped him have more energy in the gym during his workouts.

“I worked out more each week compared to what I did in the past, and it was nice because I could actually do that,” Mathisen said. “Before, I wasn’t able to, because I wasn’t in good enough shape to work out extra during the week. Once I got to a good weight, I had more energy to work out harder. I did the diet at the same time.”

Wyatt Mathisen during Spring Training in 2016 (left) and 2017 (right). Photo Credits: Tim Williams and Wilbur Miller

Mathisen ditched the heavy weights in the gym, saying that it helped a lot with managing his weight. He utilized a more explosive weight training regime, helping him in all facets of the game of baseball, as well as in the weight loss department.

All of his hard work in the off-season has resulted in an All-Star campaign for the 23-year-old Texas native. He hit .295 with a .792 OPS leading up to the All-Star break. He has 13 doubles and four home runs so far this season, both on pace for the most in his career. While he had a huge platoon split in 2014 (.922 OPS against LHP and .633 against RHP), he has maintained a level of consistency against pitchers from both sides this season (.731 vs. LHP, .790 vs. RHP).

His hitting coach Kevin Riggs said that he has been extremely open to suggestions and has applied them to making his swing better.

“He’s been very good,” Riggs said. “He’s got some moving parts in there, so we’ve tried to minimize some stuff and lower his hands a little bit. We’re just getting him a little smaller with some of his movements. I’m very excited about where he is at.”

The numbers look similar to where they were last season in Bradenton; however, Mathisen knew that he wouldn’t be able to maintain that level of productivity while still carrying around the extra weight. He is hitting line drives at a higher rate than last season (24.7%), and his coaches have noted that his approach at the plate looks much more professional this year.

“This season has been pretty good so far,” Mathisen said. “I’m happy with where I’m at, but I want to keep progressing and getting better. Obviously, I’m never satisfied with where I’m at or what I’m doing on the field. I just want to keep getting better as a player both offensively and defensively.”

Defensively, he said that he can get to more baseballs now than he ever has in the past. His quickness has benefitted “100%” from the weight loss.

“I can get to so many more balls that I couldn’t have gotten to the last couple of years,” he said. “It’s helped a lot.”

It may help in the long run, too. There have been talks of him becoming more of a utility player in the future, and he even got in a game earlier this season at second base.

“We’ve talked about in the future, especially with my weight loss, being able to move around to different positions,” Mathisen said. “Whatever would get me on the field, that’s what my goal is. That’s why I got down to this weight — to give me more options than just playing third or first base. If they need me somewhere else down the road, they can move me to those places.”

With limited power potential, the opportunities to move around may prove to be very important. He has a good swing with gap-to-gap potential, but it hasn’t translated to the long ball much. Playing a corner position, something would have to give eventually. For now, though, he isn’t thinking much about that.

“I’m not worried as much about power numbers, especially with our organization,” Mathisen said. “It’s not something that the Pirates focus on like other organizations. Home runs will come. We talk about home runs aren’t hit, they’re pitched. You have to put a good swing on the right pitches, and they’ll go out eventually.”

Overall, his hitting coach said that he’s done a great job defensively, offensively, and in the clubhouse. The hope would be that the 2017 All-Star can continue to hit well and improve in the field. If he does, he can try to carve out a spot with the Triple-A club next season, and maybe find a path to the majors.

Oldest Most Voted
Inline Feedbacks
View all comments

Theoretically moving around the field might help him get to majors but that’s not a universal truth for Pirates prospects. It also doesn’t necessarily result in a good major league player. Jack of all trades, master of none — that could be the Pirates mission statement for its hitting prospects.

Tim Williams

Adam Frazier and Josh Harrison were able to move into bigger roles because of this approach.


The book is still out on Frazier but yes, it (mostly his bat) has allowed him to find a spot in the bigs. I would expect there to be certain “success stories” that can be cited but perhaps not enough to determine that the strategy is overall an effective one vs. others. It’s not a hair-brained strategy but that’s not the standard for determining whether its the best or most prudent strategy for this organization.

Bill Harvey

No, Adam Frazier got forced into a bigger role because of the actions and decisions of two regular position players. Also, I’m not sure I would use Adam Frazier as a model of success.

Tim Williams

Frazier moved into a bigger role last year when most of the outfield was injured.

Bill Harvey

Ok, regardless, he did not get a bigger role simply because of his versatility, more than likely, he gained the versatility because there was a need. Also, having Frazier as a utility guy might be ok, but having him in an increased role is a net negative.

Tim Williams

Frazier was never an outfielder. They moved him there to add versatility. Without that, he doesn’t get that MLB chance.

Bill Harvey

My point being, he should not be on a major league roster in any scenario.

Tim Williams


Bill Harvey

Yes, he is not good. IMO, your bench bat needs to be able to hit at above replacement level pace, he cannot. Not only that, he is below average defensively wherever you put him on the field.

Tim Williams

Players who hit above average and play good defense are All-Stars, not bench players.

Bill Harvey

But Frazier is below average defensively and offensively, even for a bench player. At .3 wRC+, he just isn’t good. He possibly is the best option the Pirates have, but that is just sad, not something that should be lauded for his ability to man the field in multiple positions.


On the other hand, they only do that with guys who have fringy offensive skills. They’re not shuffling Meadows all over the place, and Bell is only playing first base now, and Newman and Craig and Hayes are more or less one-spot guys. It seems to be an avenue they pursue simply to extract the most value out of guys who really don’t have good enough bats to be Major League starters.


Agreed with all this. In addition, ML rosters have changed considerably over recent years. With only 4-5 bench spots these days, you pretty much have to be able to play more than one position if you aren’t starting. An outfielder, a catcher, and utility guys – that’s all there is room for anymore. If it was 1995, Pedro Alvarez would still have a major league job.


It took five years to figure out he was too fat?

Kerry Writtenhouse

It’s taken me 52 years, and I still think I’m big boned!! Lol


as one of my favorite prospects in the 2012 draft, i’m glad to see him finally realizing his potential.


Love that quote HRs are pitched not hit


If you need to wonder why the Pirates are awful at developing power, there’s your answer.

Major League pitchers, you see, are good.


Bell’s development would be a counterexample


For a guy like Mathisen, who doesn’t have a lot of raw power, it makes a lot of sense. For guys like Josh Bell and Will Craig, it makes much less sense.


For reference, early scouting reports from BP and FanGraphs both indicate above average to plus raw.


So, honest question…what do you base that eval of Mathisen on? How do you judge “raw power”.


Mostly just the fact that he hasn’t shown even flashes of his power as a pro. Could have been a miss on the part of the scouts, unless his swing went from decent for power in high school to instantly terrible for it as a pro. He’s also had numerous injuries which could have sapped it over time. He doesn’t even hit all that many doubles.


I think you’re confusing game power with raw power.


Raw power and game power aren’t the same, no, but you should be able to see, you know, something reflecting raw power if it’s there. Mathisen has shown nothing. He’s been hurt a lot, and that might be why. Unless he has the worst swing possible, he should at least be able to hit some doubles here and there. He doesn’t even manage that. He’s had years to fill out and add muscle, and he has done it, and there still aren’t any doubles.

The only way he actually has raw power is if he literally swings down on the ball. But he’s mostly turned in FB% between 35 and 40, which aren’t great, but which don’t reflect a guy who intentionally puts the ball on the ground, either. It’s actually not a dissimilar profile to McCutchen’s for his career.


Let Cole know that.

Travis P

Those 2 pictures right there tell the story of someone knowing their baseball career was headed towards a crossroads 5 yrs in. It really is like any other career at the end of the day. Try to work your way up, be open to new opportunities…keep plugging away. Good for him!

Comments are closed.

Most Voted Comments