Defensive tackle Luis Castillo, one of the San Diego Chargers' two first-round draft picks, agreed to a five-year contract on Tuesday and was expected to be at the second practice of training camp. Castillo's deal is potentially worth $7,035,000, including guaranteed money of $4,664,000. "Luis is a competitor and he wanted to be there with his teammates as soon as possible," said his agent, Mike McCartney. "It was important to do a good contract, but also to be a Charger today." Talks continued with San Diego's other first-round pick, outside linebacker Shawne Merriman. General manager A.J. Smith said talks with second-round pick Vincent Jackson have broken down.