Ravens safety Christian Thompson has been suspended without pay for the first four games of the regular season for violating the NFL substance-abuse policy, according to an NFL spokesman.

A second-year player who ended last season on injured reserve with a knee injury, Thompson will be eligible to return to the Ravens’ active roster on the day after the Super Bowl champions' fourth regular-season game of the 2013 season.

Thompson is eligible to participate in all preseason practices and games.

The NFL suspension will cost Thompson $112,941 of his $480,000 base salary, through the loss of four $28,235 game checks.

"We have been aware of this situation for some time," Ravens general manager Ozzie Newsome said in a statement.

Thompson is a 6-foot, 211-pound reserve player from South Carolina State who played in seven games last season on special teams and recorded no statistics as a rookie.

Thompson was signed to a four-year, $2.352 million contract last year that included a $300,584 signing bonus.

A transfer from Auburn, Thompson had 141 career tackles with three interceptions, one sack, 10 pass deflections and two fumble recoveries.

awilson@baltsun.com

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