The San Diego Chargers announced the signing of free agent linebacker Jarrett Johnson to a four-year contract. Financial terms were not disclosed. A 2003 fourth-round pick out of Alabama, the 6-foot-3, 270-pound Johnson has appeared in 129 straight games, and made 96 consecutive starts, for the Baltimore Ravens, totaling 382 tackles, 20 sacks with nine forced fumbles. Johnson became a full-time starter in 2007, signing a five-year, $20 million contract. Over the span of that contract, Johnson has 294 tackles, 17 sacks, two interceptions and eight forced fumbles. Source: Mac's Football Blog