The Discovery is the 20th book in the "Animorphs" series, written by K.A. Applegate.
 It is narrated by Marco.
 It is the first book in the David trilogy.
The Escape is the 15th book in the Animorphs series, written by K.A. Applegate.
 It is narrated by Marco.
The Capture, published in 1997 and written by K.A. Applegate, is the sixth book in the "Animorphs" series.
 It is narrated by Jake.
 "The Capture" is due to be re-released by Scholastic in March 2012.
The Attack is the 26th book in the Animorphs series, written by K.A. Applegate.
 It has the distinction of being the last book in the series written by Applegate on a regular schedule; with "The Separation", the final two books in the regular series; "The Answer" and "The Beginning", two Megamorphs books; "Elfangor's Secret" and "Back to Before", and the chronicles; "Visser", and "The Ellimist Chronicles" being the only other Animorphs related books written by her after this was published.
 It is narrated by Jake.
Boris Cabrera (born December 16, 1980 in Inglewood, California), is a former actor.
 Cabrera is primarily known as originating the role of Marco in the live-adaptation television series of the long-running book series "Animorphs".
 He left the entertainment industry in the early 2000s and became a personal fitness trainer.
The Revelation is the 45th book in the Animorphs series, written by K.A. Applegate.
 It is known to have been ghostwritten by Ellen Geroux.
 It is the first book in the ten-book arc that finalized the story of the Animorphs.
 It is narrated by Marco.
The Extreme is the 25th book in the Animorphs series, written by K.A. Applegate.
 It is known to have been ghostwritten by Jeffrey Zeuhlke.
 It is narrated by Marco.
Animorphs (also known under the promotional title AniTV) is a television adaptation made by Protocol Entertainment of the Scholastic book series of the same name by K. A. Applegate.
 It was made for YTV for Season 1 and Global for season 2 in Canada and Nickelodeon for the United States.
 The series was broadcast from September 1998 to March 2000 in the United States and Canada, and in May 2013, reruns began airing on Qubo.
The Reunion is the 30th book in the Animorphs series, authored by K.A. Applegate.
 It is known to have been ghostwritten by Elise Donner.
 It is narrated by Marco.
The Separation is the 32nd book in the Animorphs series, written by K.A. Applegate.
 It is narrated by the two "halves" of Rachel.
 This is the only numerical book written by Applegate, and not a ghostwriter, between #26 and #53.

Question: What did the actor who played Marco in the television adaptation made by Protocol Entertainment of the Scholastic book series of the same name by K.A. Applegate become after acting?
Answer: personal fitness trainer