On April 9, 2008, Hernández made his major league debut against the Toronto Blue Jays and pitched one inning and struck out one, while receiving a win in the process.

[2] He signed a minor league contract with the Toronto Blue Jays on February 28, 2012, for the 2012 season.

On May 21, 2013, the Blue Jays activated Hernández from the New Hampshire Fisher Cats disabled list, and released him.

[3] Hernandez played for the Laredo Lemurs of the American Association of Independent Professional Baseball for the 2013 season.

Hernandez signed with the Kansas City T-Bones of the American Association of Independent Professional Baseball for the 2015 season.