Pimentel attended Marian Catholic High School in San Diego, California and was a student and a letterman in football and basketball.
In basketball, as a senior, he was named the South Bay League Player of the Year.
Pimentel signed a free agent contract with the National Football League Carolina Panthers in May, 2007.
[2] Pimentel remained unsigned until December 12, when he was signed to the practice squad of the Kansas City Chiefs.
On August 6, 2008, Pimentel was signed by the Atlanta Falcons a day after linebacker Robert James was waived/injured.