The Harrisburg Senators, the Double-A affiliate of the Washington Nationals, announced their 2026 Opening Day roster last week, featuring a blend of returning players, top prospects and new acquisitions.Of the 29 players named to the roster, 17 are returning to Harrisburg.The group includes 15 players originally drafted or signed by the Nationals, seven free-agent additions, five players acquired through trades, and two Rule 5 Draft selections.Top prospects headline the rosterThe roster includes five players ranked among MLB Pipeline’s Top 30 Nationals prospects, led by infielder Seaver King, the organization’s No. 7 prospect.King returns to Harrisburg for his second season at the Double-A level after appearing in 80 games for the Senators in 2025.His 2025 numbers with Harrisburg:Batting average: .233Home runs: 3RBIs: 26Stolen bases: 18Other ranked prospects on the roster include:Alex Clemmey, LHP — No. 11Clemmey spent time in 2025 with High-A Wilmington and the Harrisburg Senators at the Double-A level.He was drafted by the Cleveland Guardians in the second round of the 2023 draft. 2025 minor league numbers:Record: 7-5ERA: 3.47Innings pitched: 116.2Strikeouts: 136Walks: 73 Sam Petersen, OF — No. 22Petersen will make his debut with the Senators in 2026, having previously spent time in the Nationals farm system at the Rookie, Single-A and High-A levels.2025 minor league numbers: Batting average: .310Home runs: 7RBIs: 28Stolen bases: 23 Eriq Swan, RHP — No. 26Swan began his minor league career with the Great Lakes Loons at the High-A level after being selected by the Los Angeles Dodgers in the fourth round of the 2023 draft.The Washington Nationals acquired him on July 31, 2025. 2025 minor league numbers: Record: 4-6ERA: 4.42Innings pitched: 91.2Strikeouts: 102Walks: 63Caleb Lomavita, C — No. 27The Hawaii native was drafted by the Washington Nationals with the No. 39 overall selection in the 2024 MLB draft.Lomavita first began at the High-A level before being called up to the Senators last season. 2025 minor league numbers: Batting average: 275Home runs: 6RBIs: 47Stolen bases: 7 Opening Day roster at a glance Total players: 29Returning players: 17Nationals draft/signing products: 15Free agents: 7Trade acquisitions: 5Rule 5 Draft picks: 2Opening Day at FNB Field for the Senators is Tuesday, April 7, at 6:30 p.m. against the Double-A affiliate of the Cleveland Guardians, the Akron RubberDucks.

HARRISBURG, Pa. —

The Harrisburg Senators, the Double-A affiliate of the Washington Nationals, announced their 2026 Opening Day roster last week, featuring a blend of returning players, top prospects and new acquisitions.

Of the 29 players named to the roster, 17 are returning to Harrisburg.

The group includes 15 players originally drafted or signed by the Nationals, seven free-agent additions, five players acquired through trades, and two Rule 5 Draft selections.

Top prospects headline the roster

The roster includes five players ranked among MLB Pipeline’s Top 30 Nationals prospects, led by infielder Seaver King, the organization’s No. 7 prospect.

SCOTTSDALE, ARIZONA - OCTOBER 31: Seaver King #5 of the Scottsdale Scorpions runs up the line on a two-run single during an Arizona Fall League game against the Salt River Rafters at Salt River Fields at Talking Stick on October 31, 2025 in Scottsdale, Arizona. (Photo by Brandon Sloter/Getty Images)

Brandon Sloter

Seaver King

King returns to Harrisburg for his second season at the Double-A level after appearing in 80 games for the Senators in 2025.

His 2025 numbers with Harrisburg:

Batting average: .233Home runs: 3RBIs: 26Stolen bases: 18

Other ranked prospects on the roster include:

Alex Clemmey, LHP — No. 11

Clemmey spent time in 2025 with High-A Wilmington and the Harrisburg Senators at the Double-A level.

JUPITER, FL - MARCH 19: Alex Clemmey #30 of the Washington Nationals pitches during the game between the Washington Nationals and the St. Louis Cardinals at Roger Dean Chevrolet Stadium on Thursday, March 19, 2026 in Jupiter, Florida. (Photo by Jared Blais/MLB Photos via Getty Images)

He was drafted by the Cleveland Guardians in the second round of the 2023 draft.

2025 minor league numbers:

Record: 7-5ERA: 3.47Innings pitched: 116.2Strikeouts: 136Walks: 73

Sam Petersen, OF — No. 22

Petersen will make his debut with the Senators in 2026, having previously spent time in the Nationals farm system at the Rookie, Single-A and High-A levels.

JUPITER, FLORIDA - MARCH 19, 2026: Sam Petersen #7 of the Washington Nationals bats during the fourth inning of a spring training Spring Breakout game against the St. Louis Cardinals at Roger Dean Chevrolet Stadium on March 19, 2026 in Jupiter, Florida. (Photo by Nick Cammett/Diamond Images via Getty Images)

Diamond Images

Sam Petersen 

2025 minor league numbers:

Batting average: .310Home runs: 7RBIs: 28Stolen bases: 23

Eriq Swan, RHP — No. 26

Swan began his minor league career with the Great Lakes Loons at the High-A level after being selected by the Los Angeles Dodgers in the fourth round of the 2023 draft.

The Washington Nationals acquired him on July 31, 2025.

2025 minor league numbers:

Record: 4-6ERA: 4.42Innings pitched: 91.2Strikeouts: 102Walks: 63

Caleb Lomavita, C — No. 27

The Hawaii native was drafted by the Washington Nationals with the No. 39 overall selection in the 2024 MLB draft.

JUPITER, FLORIDA - MARCH 19, 2026: Caleb Lomavita #82 of the Washington Nationals bats during the fourth inning of a spring training Spring Breakout game against the St. Louis Cardinals at Roger Dean Chevrolet Stadium on March 19, 2026 in Jupiter, Florida. (Photo by Nick Cammett/Diamond Images via Getty Images)

Diamond Images

Caleb Lomavita

Lomavita first began at the High-A level before being called up to the Senators last season.

2025 minor league numbers:

Batting average: 275Home runs: 6RBIs: 47Stolen bases: 7 Opening Day roster at a glance

Total players: 29

Returning players: 17

Nationals draft/signing products: 15

Free agents: 7

Trade acquisitions: 5

Rule 5 Draft picks: 2

Opening Day at FNB Field for the Senators is Tuesday, April 7, at 6:30 p.m. against the Double-A affiliate of the Cleveland Guardians, the Akron RubberDucks.