SAN DIEGO -- Cornerback Quentin Jammer signed a six-year contract with the San Diego Chargers on Tuesday, ending his seven-week holdout.

The Chargers play the Texans on Sunday, but Jammer is unlikely to see action.

"His football conditioning remains to be seen,'' coach Marty Schottenheimer said Wednesday after Jammer's first practice since minicamps in the spring.

Schottenheimer said Jammer has less than a five-percent chance of being used on Sunday. The Chargers will request a two-game roster exemption for the former All-American from Texas.

"I've got to learn everything and I've got to get in shape before I can do anything,'' Jammer said. "I'm just trying to get in shape right now.''

Jammer will receive $12.45 million over first three years of his deal, including $10.5 million in bonuses. Incentives can bump his total to $13.2 million in the first three years.

"We're glad that Quentin is in the fold and ready to go," general manager John Butler said. "We know his teammates and the coaching staff are glad he's here."

According to NFL Players Association documents, Jammer received an initial signing bonus of $6 million and base salaries of $1 million (2002), $1.25 million (2003), $1.5 million (2004), $1.75 million (2005), $2 million (2006) and $1.35 million (2007).

The Chargers next spring must exercise an option/buyout that pays Jammer a second-tier bonus of $4.5 million. When that is exercised, base salaries in some years are reduced: to $350,000 (2003), $600,000 (2004), $850,000 (2005) and $1.1 million (2006).

On face value, the six-year deal is worth $15.75 million but can climb to as high as $32.7 million if Jammer achieves all the benchmarks necessary to collect bonuses and escalators. Many of the escalators clauses, however, will be difficult to achieve.

After missing all of training camp and Sunday's season-opening 34-6 win over the Cincinnati Bengals, Jammer, the fifth pick overall in the NFL draft, practiced for the first time on Wednesday.

"I'm very excited," Jammer said. "Watching those guys play on Sunday and how energized they were, it makes you want to get out on the field with them. So that made me really excited to be here."

Information from ESPN.com senior writer Len Pasquarelli, The Associated Press and SportsTicker was used in this report.