|Chicago White Sox – No. 50|
|Born: July 1, 1993|
São Paulo, Brazil
|August 14, 2017, for the Seattle Mariners|
|MLB statistics |
(through June 16, 2019)
|Earned run average||7.36|
The Mariners signed Vieira as a free agent in 2010. He pitched for the Venezuela Mariners for two years, spent the 2013 season as a starter for the low-A Everett AquaSox, then spent the 2014 and 2015 seasons as a reliever for the Clinton LumberKings. After an extended spring training in 2016, he joined high-A Bakersfield Blaze as a reliever, where he worked extensively with pitching coach Ethan Katz.
The Mariners added him to their 40-man roster after the 2016 season.
He was selected for Brazil national baseball team at the 2013 World Baseball Classic Qualification, 2013 World Baseball Classic, 2017 World Baseball Classic Qualification and 2019 Pan American Games Qualifier.
- "Meet Thyago Vieira: The 103-mph throwing Mariners relief prospect who learned how to locate". The Seattle Times. 2016-12-16. Retrieved 2016-12-18.
- Adams, Steve (November 16, 2017). "Mariners Trade Thyago Vieira To White Sox For International Bonus Money". mlbtraderumors.com. Retrieved November 16, 2017.
- "BRASIL". Prē Pan 19 (in Portuguese). Retrieved March 10, 2019.