Kaden Polcovich, pictured earlier this month, had a key go-ahead single in the AquaSox’s series against Vancouver last week. (Andy Bronson / The Herald)

Kaden Polcovich, pictured earlier this month, had a key go-ahead single in the AquaSox’s series against Vancouver last week. (Andy Bronson / The Herald)

AquaSox weekly update: Williamson shines, Sox split series

Brandon Williamson had a spectacular start, J-Rod is playing in an Olympic qualifier, and more.

The Everett AquaSox and Vancouver Canadians entered this past week’s six-game series as part of a three-way tie with the Eugene Emeralds atop the High-A West.

And after the dust settled following an action-packed series split between the two teams, Everett and Vancouver ended the week exactly where they began — in a three-way tie with Eugene for first place in the league standings.

Here is The Herald’s weekly AquaSox update:

LATE-GAME DRAMA

Three of the six games in Everett’s series with Vancouver were decided by a go-ahead or winning run in the ninth inning, including a pair of walkoff wins by the Canadians.

The AquaSox opened the series by rallying for a 5-3 victory last Tuesday. Trailing 3-2 with two outs in the top of the ninth, Everett leadoff hitter Kaden Polcovich came through with a line-drive two-run single to left field that drove in the game-tying and eventual game-winning runs.

The Canadians returned the favor on Thursday. After the AquaSox scored three runs in the seventh to tie the game, Vancouver’s Spencer Horwitz grounded a walkoff single to center field in the bottom of the ninth to give the Canadians a 5-4 win.

And in Sunday’s series finale, Vancouver won again in walkoff fashion. With the game tied in the bottom of the ninth, Horwitz hit a leadoff double and came around to score on a sacrifice fly by Luis De Los Santos to give the Canadians a 2-1 victory and a series split.

WILLIAMSON SHINES, ACCOMPLISHES RARE FEAT

AquaSox starter Brandon Williamson tossed the best game of his young minor league career Saturday night.

The 2019 second-round draft pick out of Texas Christian University struck out 13 of the 25 batters he faced in 7 1/3 brilliant innings pitched. He allowed just one run, two hits and one walk in Everett’s 9-1 win.

Williamson even threw a rare immaculate inning in the third inning, meaning he struck out all three batters in the frame on a total of just nine pitches. It was the first immaculate inning by an AquaSox pitcher since Nick Hill accomplished the feat in 2007, according to Everett play-by-play announcer Pat Dillon.

It was the longest start of Williamson’s minor league career. The 6-foot-6 left-hander was limited to no more than two innings of work in each of his nine starts with Everett in 2019, and he hadn’t thrown more than 4 2/3 innings in his first three starts this season.

Williamson, ranked by MLB.com as the No. 10 prospect in the Seattle Mariners’ organization, has posted a 2.25 earned-run average in 20 innings pitched this season. Four of the five runs he’s allowed came in his previous start against Spokane on May 22. In his other three starts, he’s yielded just one run and five hits over 15 1/3 innings.

Williamson has struck out 39 batters and walked just seven, while posting a 0.80 WHIP (walks plus hits per innings pitched) and a .132 opponents’ batting average. He’s averaging 1.95 strikeouts per inning and has fanned a whopping 50.6% of the batters he’s faced.

THEN BOUNCES BACK WITH STRONG START

Juan Then also had an impressive start this week. The 21-year-old from the Dominican Republic tossed six scoreless innings on Sunday, while retiring 18 of the 20 batters he faced. He struck out six batters, walked none and allowed just two hits.

It was a nice bounceback performance for the Mariners’ No. 9-ranked prospect, who was coming off a rough start against Spokane the previous week, when he allowed four earned runs in 3 1/3 innings pitched. For the season, Then has a 3.86 ERA in 14 innings, with 11 strikeouts and four walks.

LARSEN CONTINUES HOT HITTING

AquaSox outfielder Jack Larsen remained the High-A West batting leader with another strong week at the plate.

The 26-year-old former undrafted free agent out of the University of California-San Diego went 6-for-21 with three doubles in the series against Vancouver and is riding a seven-game hitting streak.

Larsen leads the High-A West in batting average (.337), is third in on-base percentage (.417) and is second in slugging percentage (.602). He has four home runs and 10 doubles.

Larsen’s production this season is a major uptick from his last minor league season with Advanced-A Modesto in 2019, when he posted a .237 batting average, .335 on-base percentage and .402 slugging percentage.

J-ROD, McGUIGAN PLAYING IN OLYMPIC QUALIFIER

Two AquaSox players are spending this week in Florida, where they are playing with their respective national teams at the Baseball Americas Qualifier for this summer’s Tokyo Olympics.

Highly touted AquaSox outfielder Julio Rodriguez, ranked by Baseball America as the sport’s No. 3 overall prospect, is playing for his native Dominican Republic. AquaSox pitcher Brendan McGuigan is on Canada’s roster.

The eight-team event, which includes the United States, began Monday and runs through Saturday. The first-place team earns an automatic bid to the Olympics. The second-place and third-place teams advance to another qualifying tournament in Mexico, where they will have one final chance to punch their ticket to Tokyo.

Rodriguez and the Dominican Republic opened group play Monday with a 5-2 win over Puerto Rico. Rodriguez batted third for the Dominican Republic and went 2-for-5 with two singles and two runs scored. He also made a key sliding catch in right field.

Through 21 games with the AquaSox this season, Rodriguez is batting .322 with five home runs, one triple and five doubles. He ranks third in the High-A West in batting average, fifth in on-base percentage (.404) and fourth in slugging percentage (.575). The 20-year-old phenom went 5-for-11 in last week’s series against Vancouver before exiting Thursday’s game to catch a flight to Florida.

McGuigan hasn’t allowed a hit this season in 10 innings pitched, over the course of six relief appearances. The 25-year-old former undrafted free agent has surrendered only one run, while posting 17 strikeouts and just three walks.

NO HANCOCK, KIRBY

Neither of the AquaSox’s top two pitching prospects appeared in this past week’s series against Vancouver.

George Kirby, ranked by MLB.com as the No. 77 overall prospect in baseball, didn’t pitch for the second consecutive series. The Mariners’ 2019 first-round draft pick hasn’t pitched since his May 14 start against Tri-City. According to a tweet from The Seattle Times’ Ryan Divish last Friday, Kirby is slated to pitch in a game this week.

Emerson Hancock, the Mariners’ 2020 first-round draft pick and MLB.com’s No. 25 overall prospect, last pitched in his May 20 start against Spokane.

STANDINGS UPDATE

Everett, Vancouver and Eugene are in a three-way tie atop the High-A West, with all three teams at 15-9. The league’s next-closest team is five games behind them.

UP NEXT

After spending three of their first four weeks on the road, the AquaSox return to Funko Field for a 12-game homestand. Everett opens a six-game series against Hillsboro on Tuesday night. The following week, the Sox host Eugene for a six-game series.

Talk to us

> Give us your news tips.

> Send us a letter to the editor.

> More Herald contact information.

More in Sports

Silvertips forward Jesse Heslop (left) pushes through the neutral zone during Everett's 9-4 win against Victoria at Angel of the Winds Arena on Oct. 4, 2025. (Joe Pohoryles / The Herald)
Tips Week in Review: Everett scores 21 goals in weekend sweep

The Silvertips pile up goals in two wins against Tri-City and one against Victoria.

Shorewood’s Xander Gordon hits the ball during the boys singles championship match at Snohomish Summer Smash at Snohomish High School in Snohomish, Washington on Sunday, July 21, 2024. (Annie Barker / The Herald)
Shorewood downs Edmonds-Woodway to retain league lead at 11-0

The Stormrays move to 12-1 overall in a 6-1 win over the second-place Warriors on Monday.

Archbishop Murphy sophomore setter/pin hitter Teuila Halalilo hits the ball in a Wesco 3A/2A South matchup against Edmonds-Woodway in Everett, Wash., on Oct. 9, 2024. The unranked Wildcats won 3-1 and handed the No. 10 Warriors their first loss of the season. (Taras McCurdie / The Herald)
Archbishop Murphy sweeps to improve to 8-0

The Wildcats notch their sixth sweep of the season to take down Shorecrest on Monday night.

Julio Rodriguez of the Seattle Mariners reacts as he rounds third base after hitting a two-run home run in the first inning against the Atlanta Braves at Truist Park on Saturday, Sept. 6, 2025, in Atlanta. (Kevin C. Cox / Getty Images / Tribune News Services)
Five key moments led Mariners to Game 2 ALDS win

The Seattle Mariners bounced back in front of 47,371 fans… Continue reading

Jorge Polanco (7) of the Seattle Mariners runs to second base after hitting a two-run home run in the third inning of a game against the Atlanta Braves at Truist Park on Sunday, Sept. 7, 2025, in Atlanta. (Edward M. Pio Roda / Getty Images / Tribune News Services)
Polanco’s 2 HR, Rodriguez’s double even ALDS for Mariners

On a night the Mariners needed to be unbelievable, Luis Castillo was… Continue reading

Silvertips forward Shea Busch looks to receive a pass before heading up ice during Everett's 9-4 win against Victoria at Angel of the Winds Arena on Oct. 4, 2025. Busch had a hat trick and two assists in the win. (Joe Pohoryles / The Herald)
Silvertips power past Victoria with red-hot top line

Shea Busch records a hat trick and two assists to lead Everett to 9-4 win on Saturday.

Lake Stevens’ Blake Moser points after getting enough yards for a first down during the game against Sumner on Friday, Sept. 5, 2025 in Lake Stevens, Washington. (Olivia Vanni / The Herald)
Lake Stevens football dominates Glacier Peak in battle atop Wesco 4A

A kick return touchdown and interception supplement the Vikings’ dominant 49-14 win on Friday.

Marysville Pilchuck’s Christian Van Natta lifts the ball in the air to celebrate a turnover during the game against Marysville Getchell on Friday, Sept. 16, 2022 in Marysville, Washington. (Olivia Vanni / The Herald)
Wesco 3A South leaders Shorewood, Mountlake Terrace stay perfect

The Stormrays and Hawks both leveraged dominant wins to move to 5-0.

Seahawks quarterback Sam Darnold (14) throws a pass against the Tampa Bay Buccaneers on Sunday, Oct. 5, 2025 at Lumen Field in Seattle Washington. (Photo courtesy of the Seattle Seahawks)
Dave Boling: Seahawks couldn’t stick the landing against Bucs

With the Mariners’ postseason in action across the street, the… Continue reading

Rajveer Lahankar hits the ball during the district championship doubles match on Thursday, Oct. 24, 2024 in Snohomish, Washington. (Olivia Vanni / The Herald)
Jackson sweeps doubles to stay undefeated

The Timberwolves improved to 10-0 in league play after trailing Kamiak 3-1 in singles play.

King’s falls in five sets for second consecutive match

Weekend prep roundup for Oct. 3-4: (Note for coaches/scorekeepers: To report results… Continue reading

Archbishop Murphy's Ashley Fletcher (left), Emma Morgan-McAuliff (center) and Layla Miller celebrate after scoring a point in the Wildcats' 3-0 win against Shorewood at Shorewood High School on Oct. 2, 2025. (Joe Pohoryles / The Herald)
Archbishop Murphy volleyball dominates Shorewood

The Wildcats remain undefeated with 3-0 win, hand Stormrays first league loss on Thursday.

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.