"For this series here, you want to have an extra lefty if you can," Dodgers manager Don Mattingly said. "They've got so many guys that you really want to be left-handed with, so it's nice to be able to have him."
Rodriguez made the Opening Day roster and has notched a 6.43 ERA in two stints with Los Angeles. He had a 4.56 ERA in 29 appearances for Albuquerque this season before being recalled Friday.
After his most recent stint, the Dodgers worked the left-hander on mechanics.
"It seemed like about a month ago it was, 'Hey, Paco has really been throwing the ball well,'" Mattingly said. "We knew at that point if we had an opportunity for him, he'd be ready."
That opportunity came Friday with an open roster spot after the Dodgers optioned Pedro Baez to Triple-A on Sunday before the All-Star break.
The 23-year-old Rodriguez owns a 3-5 record and a 2.65 ERA in 97 games in the Majors. The second-round selection in the 2012 First-Year Player Draft made 76 appearances for the Dodgers last season, going 3-4 with a 2.32 ERA.
Rodriguez moved quickly through the organization and has made just 50 career appearances in the Minor Leagues. He has a 3-3 career record and a 2.98 ERA in the Minors.
Alex Halsted is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.