The Underdog/El Subestimado

The Underdog/El Subestimado is the second studio album by Tego Calderón on August 29, 2006. The first single of the album was titled "Los Maté" ("I Killed Them"), which has garnered much air-play on the radio. During a press conference in Puerto Rico, Tego Calderón expressed that this new album is "a diary of sorts from my experiences. There are happy moments and sad ones".

This time around, Tego decided not to use as much reggaeton and focus more on hip-hop. He is also a fan of salsa, blues, funk and reggae (the second single of the album, "Chillin'", is a reggae song completely in Spanish) and he incorporates these styles in the album. Because of this, many fans were surprised, as they expected classic reggaeton. The album garnered points in originality, making it stand out more than Daddy Yankee's Barrio Fino en Directo and Don Omar's King of Kings.

The album debut at 43 on Billboard 200 and at the Top of Us Latin Rhythm Album Chart. As of 2011, it sold 99,000 units in the United States.