De La Rosa follows Jerry Sands as the second active Dodger who began last season in Single-A ball. (Correction: Make it three, as Kenley Jansen also qualifies.) De La Rosa has a 2.92 ERA and 52 strikeouts in 40 innings this season for Chattanooga.
He figures to be a top candidate for the starting rotation as soon as next season, but while this move will put him in the bullpen, it might help preserve an arm that had only thrown 180 professional innings before this season. Chad Billingsley and Pedro Martinez are among the starting pitchers who spent early portions of their major-league careers in relief.
In the process, the Dodgers gave up on Lance Cormier, designating him for assignment rather than sending Ramon Troncoso back to the minors and making room for De La Rosa in some other fashion.