Octavio Antonio Fernández Castro (June 30, 1962 – February 15, 2020), better known as Tony Fernández, was a Dominican baseball shortstop. He played 17 seasons in Major League Baseball for seven teams. He mainly played for the Toronto Blue Jays. Fernández was known for his defensive skills, setting a nine-year record for shortstops with a .992 fielding percentage in 1989, while still holding the single-season fielding percentage record for third basemen with .991 in 1994.
Fernández announced in 2017 that he had been diagnosed with kidney disease. On February 15, 2020, Fernández died of problems related to the disease; he had suffered a stroke and was placed in an induced coma.