To begin 2011, Troncoso joined the Triple-A Albuquerque Isotopes. However, on April 16, he was recalled from the minors when Hong-Chih Kuo was placed on the disabled list. He was optioned back to the minors five days later after allowing 12 hits in 2 2/3 innings pitched. He spent most of the season with the Isotopes, pitching in 35 games with a 2-4 record and 5.05 ERA before rejoining the Dodgers in September. With the Dodgers he appeared in 18 games and had a high ERA of 6.75. The Dodgers designated him for assignment on March 22, 2012 and removed him from the 40-man roster. He spent the entire 2012 season in Albuquerque and was 4-1 with a 6.67 ERA in 45 games.