Guerra was put on the bereavement list on Saturday to be with his father, who was hospitalized in Mexico after suffering a heart attack Friday morning.
The righty reliever was back in the Dodgers' clubhouse Wednesday morning and was upbeat about his father, who had three blocked arteries. Guerra's father had surgery on Tuesday and had two stents inserted.
Guerra's return will be greatly welcomed with the Dodgers' bullpen overworked and struggling lately. Ronald Belisario has allowed runs in three of his last five outings while Kenley Jansen has blown saves in his last two appearances. On Saturday, Jansen gave up two runs without making a pitch and on Tuesday he gave up an RBI single to Hunter Pence after Belisario loaded the bases.
The move sends Fife back to the Minors after making his Major League debut on Tuesday. He pitched six innings, allowing one run on four hits while walking three and striking out one.
"I thought he was good," manager Don Mattingly said. "We couldn't have really asked for much more."