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Guerrero Placed on Seven-Day Concussion IL After Head Hit

8/16/2026

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Summary

Guerrero Concussion

First baseman Vladimir Guerrero Jr. was placed on the concussion injured list on Aug. 15, 2026 after shortstop George Lombard Jr.'s knee struck his head.
Toronto recalled outfielder Daz Cameron, designated infielder Lazaro Estrada for assignment, promoted pitcher Ricky Tiedemann and optioned pitcher Chase Lee.
Guerrero is batting .263 with seven homers and 46 RBIs in 115 games as Toronto sits 60-64, one game behind Detroit for AL wild-card.

Summary

Guerrero sidelined

Guerrero was placed on a seven-day concussion list, his first IL stint.
Manager John Schneider, who retired in 2008 after seven concussions, said he empathizes with head-injured players.
MLB protocol mandates Guerrero complete a Return-to-Play form and baseline cognitive testing before clearance.
Toronto will start player Charles McAdoo, player Kazuma Okamoto and call-up Daz Cameron at first base while Guerrero recovers.

History

Historical Context

In the 2000s, professional leagues began formalizing concussion management, echoing the 2004 Prague conference’s decision to drop grading scales. Dr. Robert Cantu’s grading system and the National Athletic Trainers’ Association’s symptom-free return-to-play rule guide baseline testing used pre-season across clubs. Concussions account for up to five percent of sports injuries, prompting protective equipment and policy changes.

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Guerrero Concussion

First baseman Vladimir Guerrero Jr. was placed on the concussion injured list on Aug. 15, 2026 after shortstop George Lombard Jr.'s knee struck his head.
Toronto recalled outfielder Daz Cameron, designated infielder Lazaro Estrada for assignment, promoted pitcher Ricky Tiedemann and optioned pitcher Chase Lee.
Guerrero is batting .263 with seven homers and 46 RBIs in 115 games as Toronto sits 60-64, one game behind Detroit for AL wild-card.

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