Oscar Eduardo Hernández Rios (born July 9, 1993) is a Venezuelan professional baseball catcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Arizona Diamondbacks and Kansas City Royals.

He split the 2013 season between the Low-A Hudson Valley Renegades and the Single-A Bowling Green Hot Rods, accumulating a .227/.286/.364 slash line in 46 games between the two teams.

He had a rehabilitation assignment in June with the Triple-A Reno Aces and the Single-A Kane County Cougars,[3] then was activated to the Diamondbacks' MLB roster on July 4.

In 2016, he appeared in four MLB games with Arizona, batting .182 with one home run, which came on August 10 off of Jerry Blevins, helping the Diamondbacks defeat the New York Mets, 3−2, at Citi Field in 12 innings.

[9] He was activated from the restricted list at the end of May, and was assigned to the Triple-A Pawtucket Red Sox where he batted .205 with one home run and 14 RBIs in 47 games.

[10] Hernández started the 2019 season with the Double-A Portland Sea Dogs, then was assigned to Triple-A Pawtucket in late April.

[12] He was designated for assignment by the Red Sox on July 2, in order to open a spot on the 40-man roster for Trevor Kelley.