Hernandez was designated for assignment by Milwaukee on Thursday.
Hernandez was claimed off waivers by the Brewers on Tuesday.
Hernandez was designated for assignment by the Dodgers on Tuesday, Eric Stephen of True Blue LA reports.
The Reds traded Hernandez to the Dodgers on Tuesday, John Fay of The Cincinnati Enquirer reports.
Hernandez was promoted to the big-leagues prior to Friday's game against the Pirates.
Hernandez was optioned to Triple-A Louisville on Saturday.
Hernandez gave up a two-run homer in Sunday's loss to the Nats, one of five given up by the Reds and the third by Hernandez. Only one run was charged to Hernandez, who came on in relief of Homer Bailey.
Hernandez was recalled from Triple-A Louisville on Wednesday.
Hernandez was optioned to Triple-A Louisville on Saturday.
After a perfect eighth inning Wednesday, Hernandez has retired all 14 batters that he's faced so far this season.