The Los Angeles Dodgers have added infielder Nick Ramirez, outfielder Justin Wrobleski, and outfielder Michael Petersen to their 40-man roster. Ramirez, 28, has played parts of three seasons in the majors, primarily as a utility infielder. Wrobleski, 27, has spent the past two seasons in the Dodgers’ organization, primarily at Triple-A Oklahoma City. Petersen, 28, has played parts of three seasons in the majors with the San Diego Padres and Seattle Mariners.