Riley O'Brien

Nationality

United States

Born

1995-02-06

Height

6' 4"

Weight

180 lbs

Number

#61

Riley Chun-Young O'Brien (born February 6, 1995) is an American professional baseball pitcher for the St. Louis Cardinals of Major League Baseball (MLB). He has previously played in MLB for the Cincinnati Reds and Seattle Mariners. He made his MLB debut in 2021.