Pittsburgh Pirates Reliever Evan Sisk Switches to Number 48 for 2026 Season

Pittsburgh Pirates left-handed pitcher Evan Sisk is changing his uniform number. The reliever will wear No. 48 for the upcoming 2026 MLB season. The switch was confirmed ahead of spring training activities. Sisk previously wore No. 51 after joining the team last year.

The number was previously worn by infielder Enmanuel Valdez. Valdez remains with the organization and will now wear No. 47. This type of jersey number adjustment is common during offseason roster reshuffling.

Sisk’s 2025 Performance and Path to Pittsburgh

Evan Sisk joined the Pirates in a notable July trade. He was acquired from the Kansas City Royals alongside a prospect. The move sent pitcher Bailey Falter to Kansas City. According to league transaction logs, it was a deadline deal focused on future pieces.

Sisk’s initial performance had mixed results. He posted an 8.10 ERA over his first four major league appearances with Pittsburgh. His season improved significantly during a September call-up. He delivered seven scoreless outings in that final month.

His final 2025 stats show promise for a bullpen role. Sisk finished with a 4.38 ERA over 14 total games. He recorded 14 strikeouts in just over 12 innings pitched. The lefty demonstrated an ability to miss bats at the highest level.

Analyzing Sisk’s Pitching Arsenal and 2026 Bullpen Fit

The Pirates have a clear need for reliable left-handed relief. Sisk’s pitch data reveals a distinct strength with his offspeed offerings. His sweeper and curveball were highly effective against big-league hitters last season. These pitches will be key to his success.

His faster pitches, however, were hit hard. Opponents batted .286 against his sinker and .357 against his four-seam fastball. Refining this velocity aspect will be a crucial offseason focus. The team’s bullpen construction offers him a real opportunity.

With few other left-handed options on the 40-man roster, Sisk’s path is open. Veteran Gregory Soto was signed to a major league deal. Top prospect Hunter Barco has minimal experience. This situation sets the stage for Sisk to earn a substantial role.

Evan Sisk enters 2026 with a new number and a clear opportunity. His performance this spring will determine if he secures a lasting spot in the Pirates’ bullpen. The left-hander has the tools to become a trusted arm for Pittsburgh.

Thought you’d like to know

Why did Evan Sisk change his number?

He switched from No. 51 to No. 48 for the 2026 season. The number was vacated by infielder Enmanuel Valdez, who moved to No. 47. Such changes are routine as rosters evolve each year.

How did Sisk perform after the Pirates acquired him?

He had a rough start but finished strong. After a high ERA in August, he posted a 3.38 ERA in September. Seven of his nine appearances that month were scoreless.

What is Sisk’s best pitch?

His offspeed pitches were most effective. Opponents hit just .176 against his sweeper and .125 against his curveball. These will be his primary weapons moving forward.

What does this mean for the Pirates’ bullpen?

It highlights their need for left-handed help. Sisk is one of only three lefty relievers on the 40-man roster. He will compete for a key middle-inning role this spring.

Is Sisk under team control for future seasons?

Yes, he has multiple years of team control remaining. This gives the Pirates a cost-effective bullpen option if he develops consistency. His 2026 season is a major audition.