The Blue Jays selected Valenzuela's contract from Triple-A Buffalo on Thursday.
Valenzuela is now protected from next month's Rule 5 Draft. Acquired at the trade deadline from the Padres in exchange for Will Wagner, Valenzuela slashed .224/.309/.383 with 15 home runs over 113 games between the Double- and Triple-A levels in 2025. The 25-year-old will likely begin the 2026 campaign back at Buffalo.