Aquasox’s Michael Plassmeyer watches the action on the field against the Spokane Indians Tuesday evening at Everett Memorial Stadium on July 17, 2018. (Kevin Clark / The Herald)

Aquasox’s Michael Plassmeyer watches the action on the field against the Spokane Indians Tuesday evening at Everett Memorial Stadium on July 17, 2018. (Kevin Clark / The Herald)

AquaSox’s pitcher comes from family of left-handers

Mariners’ 4th-round pick fools hitters with a southpaw delivery he shares with his dad and brother.

EVERETT — Statistics place the percentage of left-handed people at about 10 percent worldwide.

In Major League Baseball, where being left-handed offers certain advantages, it is approximately 25 percent.

Then there is the Plassmeyer family. For two generations the Plassmeyers have capitalized on being southpaws, and Everett AquaSox starter Michael Plassmeyer has done so in the Northwest League this summer.

Plassmeyer’s father, Marty, was a left-handed starter at Division I Nicholls State, and his older brother, Mitch, is a left-handed reliever at Division I Bradley University in Illinois.

“It kind of runs in the family and makes it easier,” said Plassmeyer, who returns to Everett with his NWL North Division first-half champion teammates tonight at 7:05 p.m. against Vancouver.

Plassmeyer was the Seattle Mariners’ fourth-round pick out of the University of Missouri in June. He has been largely unhittable this summer as he has fashioned an 0-1 record with a 2.13 earned-run average and a 0.79 WHIP. Opposing hitters are batting just .188 against him and he’s fanned 25 hitters in 122⁄3 innings.

“As a lefty he has real good deception and it looks like right now it’s very tough for the hitter to figure it out,” Everett manager Jose Moreno said. “The key is to throw strikes. When you can throw strikes like him you have a chance to succeed.”

The 6-foot-2, 200-pounder has made seven appearances including six starts. However, he has been limited to just two innings per appearance after throwing more than 90 innings for Mizzou this spring.

“I’ve been a starter my whole college career and everything,” Plassmeyer said. “When you start the game you kind of want to keep rolling once you’re out there. I understand why (that’s the case) with the innings limit and everything.”

Plassmeyer does not throw exceptionally hard. He tops out at about 91-92 miles-per-hour, relying more on location and pitch selection to be effective. He changed his grip on what he terms his “slurve” at the end of his sophomore year at Mizzou and spent last offseason working on it.

“(The coaches) wanted something harder and sharper, and my old (curveball) was kind of loopy so guys could see it right away,” Plassmeyer said. “Then coming back for my junior year I was comfortable with it. It was just kind of figuring out how to locate it and make it work from there.”

Unlike the majority of his college and now professional teammates, Plassmeyer never pitched in summer ball. Instead he trained back home in St. Louis at P3 Academy with former Missouri volunteer assistant and now Mariners bullpen coach Brian DeLunas, perfecting the slurve while adding several miles-per-hour to his fastball according to a story in the Columbia Daily Tribune.

“(Velocity) has always kind of been the thing I’ve needed to work on,” Plassmeyer said. “I’ve always trusted myself to throw strikes, so rather than go and just pitch more innings it just made more sense to me to do a velo program in the offseason.”

The transition to the “everyday grind”of professional baseball is something to which Plassmeyer has had to adjust.

“Here it’s just game, game, game and then try to get your work in on your own,” Plassmeyer said. “So kind of coming up with a routine where I can still work on stuff on my own.”

As a junior at Mizzou in 2018 he went 5-4 with two complete games in 14 starts. He struck out 103 while walking just 17 in 91 1/3 innings and fashioned a 3.05 ERA. The Mariners took him 118th overall before assigning him to Everett.

“I went a little bit higher than I expected,” he said. “I was happy to hear it in the fourth.”

Plassmeyer has started six of the seven games in which he’s appeared for Everett, with his lone relief appearance coming in the game started by Rob Whalen in a rehab appearance on July 11. Plassmeyer has allowed runs in just two of his seven appearances.

He surrendered two runs on two hits in 1 2/3 innings while still fanning three in what was ostensibly his worst start during Everett’s 4-3 win at Eugene on June 29. Plassmeyer also suffered his first loss on Saturday at Boise during the Hawks’ 9-0 win when he allowed a two-run home run following a second-inning error. He’s given up just five hits and fanned 17 in his other five outings.

“Right now he’s doing a real good job, and that’s going to be depending on the learning process, getting strong and trying to learn the sequences to be able to pitch at the next level,” Moreno said.

For the latest AquaSox news follow Jesse Geleynse on Twitter.

Talk to us

> Give us your news tips.

> Send us a letter to the editor.

> More Herald contact information.

More in Sports

Everett AquaSox infielder Michael Arroyo receives high-fives in the dugout during Everett's 8-1 win against Tri-City at Funko Field in Everett, Washington on June 13, 2025. The 20-year-old Colombia native had two home runs and a career-high six RBI. (Shari Sommerfeld / Everett AquaSox)
Arroyo’s big night lifts AquaSox to 8-1 win over Tri-City

The 20-year-old smacks 2 homers and a career-high 6 RBI while extending hit streak to 10.

Everett Silvertips defenseman Landon DuPont was named CHL Rookie of the Year at the 2025 CHL Awards in Toronto, Ontario. (Photo courtesy of Josh Kim / Canadian Hockey League)
Tips’ Landon DuPont named CHL Rookie of the Year

The 16-year-old is the first defenseman in 30 years, and first Silvertip ever, to win the award.

Stanwood sophomore Addi Anderson in The Herald's 2025 All-Area Softball Pitcher of the Year. (Olivia Vanni / The Herald)
The Herald’s 2025 Softball Pitcher of the Year: Addi Anderson

The Stanwood sophomore had a 1.32 ERA to lead the Spartans to a district championship.

Michael Arroyo hit a 2-run home run for the Everett AquaSox in an 11-4 loss to the Tri-City Dust Devils at Funko Field on Thursday, June 12, 2025. (Photo courtesy of Shari Sommerfeld / Everett AquaSox)
AquaSox pitching goes cold in loss to Dust Devils

Although they held a first-inning lead, the Everett AquaSox fell… Continue reading

Jackson senior and UW commit Allie Thomsen is The Herald's 2025 All-Area Softball Hitter of the Year. (Olivia Vanni / The Herald)
The Herald’s 2025 Softball Hitter of the Year: Allie Thomsen

The Jackson senior had a .544 batting average and 1.600 OPS while striking out just once.

Seahawks defense end Leonard Williams (99) participates in a workout at minicamp at the Virginia Mason Athletic Center on Wednesday, June 11, 2025. (Photo courtesy of Edwin Hooper / Seattle Seahawks)
Seahawks bond over stories of their paths to football glory

Leonard Williams’ path to the NFL included stints of homelessness.

Edmonton Oilers center Leon Draisaitl (29) celebrates with teammates after scoring the game-winning goal in overtime against the Florida Panthers during Game 4 of the NHL Stanley Cup Final at Amerant Bank Arena on Thursday, June 12, 2025, in Sunrise, Fla. (David Santiago / Tribune News Services)
Panthers blow lead, Oilers even Stanley Cup Final series

The game probably shouldn’t have gotten to this point.… Continue reading

Edmonds-Woodway senior Alex Plumis is The Herald’s 2025 Boys Soccer Offensive Player of the Year on Thursday, June 5, 2025 in Edmonds, Washington. (Olivia Vanni / The Herald)
The Herald’s 2025 Boys Soccer Offensive Player of the Year: Alex Plumis

The Edmonds-Woodway senior scored 23 goals and dished nine assists.

Stanwood’s Rubi Lopez cheers after getting a base hit during the 3A District 1 championship game against Sedro-Woolley on Thursday, May 15, 2025 in Everett, Washington. (Olivia Vanni / The Herald)
Wesco all-league softball teams announced

Wesco has announced its all-league teams for boys soccer. WESCO 4A First… Continue reading

Taylor Dollard of the Everett AquaSox throws a pitch in a 5-2 victory over the Tri-City Dust Devils at Funko Field on Wednesday, June 12, 2025. (Photo courtesy of Shari Sommerfeld / Everett AquaSox)
Strong pitching anchors AquaSox, sinks Tri-City

Everett AquaSox pitching held Tri-City Dust Devils to just two… Continue reading

Seahawks quarterback Sam Darnold (14) hands off to running back Zach Charbonnet (26) during minicamp at the Virginia Mason Athletic Center on Tuesday, June 10, 2025. (Photo courtesy of Edwin Hooper, Seattle Seahawks)
Dave Boling: Sam Darnold’s first priority is the run game

For those Seattle Seahawks fans curious about the early… Continue reading

Pacers rely on unlikely heroes, take 2-1 NBA Finals lead

Indiana Pacers Coach Rick Carlisle sounds like a nature lover… Continue reading

Support local journalism

If you value local news, make a gift now to support the trusted journalism you get in The Daily Herald. Donations processed in this system are not tax deductible.