Willson Contreras clinched a place on the 2026 American League All-Star roster during a breakout first season with Boston. He joined the team as an injury replacement for Toronto first baseman Vladimir Guerrero Jr., not as an original roster pick. The honor belongs to Willson, not his brother William. In its July 13 profile, MLB described Willson's Boston season as a breakout that produced his first All-Star selection since 2022.
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Table of Contents
- The numbers behind the breakout
- Why was Contreras an injury replacement?
- What the selection adds to his career
- Why the Boston context matters
The numbers behind the breakout
Contreras had 20 home runs, a .284 batting average, and a .920 OPS when selected. OPS combines on-base and slugging percentages to measure reaching base and hitting for power. Among American League first basemen, his batting average ranked first and his OPS ranked third, according to MLB's July 11 announcement.
Those rankings make the selection understandable even though it came through an injury opening. His situational production added context. Before roster selection, MLB reported a 1.145 OPS with two outs and runners in scoring position and a 1.066 OPS in Boston's 37 wins. These splits show that much of his strongest hitting came in scoring opportunities and winning performances.
Why was Contreras an injury replacement?
Guerrero declined his All-Star place because of a lower-back issue. Contreras then filled the resulting opening at first base for the American League.
That distinction matters when evaluating the phrase "clinched All-Star honors." MLB's official roster identifies Contreras with its replacement marker, so he was not chosen for the initial roster. He nevertheless received an official All-Star selection. The replacement status explains how he entered the roster; it does not change the documented career honor.
What the selection adds to his career
The 2026 bid was Contreras's fourth career All-Star selection. His previous appearances came in 2018, 2019, and 2022, making this his first in four years.
He also received his first invitation to the T-Mobile Home Run Derby. That invitation extended the recognition beyond his place on the All-Star roster and highlighted the power behind his 20-home-run start.
Why the Boston context matters
Boston acquired Contreras from St. Louis on December 22, 2025. The Cardinals received pitchers Hunter Dobbins, Blake Aita, and Yhoiker Fajardo, while the deal also included cash considerations.
The trade makes this breakout especially notable because it occurred during Contreras's first Red Sox season. By July 13, he had already matched his entire 2025 total of 20 home runs. Contreras had also recorded 61 RBIs, meaning runs batted in. As of July 13, that left him 19 RBIs short of his personal best.
