A starter at free safety in his first three years in the NFL, Keion Carpenter was among those the Bolts worked out. He moved on to Atlanta and missed the entire 2004 season due to injury. Carpenter last played in 2005 for Atlanta where he totaled 55 tackles and picked off two passes. He has 14 career interceptions over a seven-year career.
Deke Cooper, a four-year veteran, was also on the list of invites. The defensive back began his career with Carolina before moving on to Jacksonville where he enjoyed some success. He tallied 154 tackles over a three-year span with three interceptions. Cooper went to camp with the Miami Dolphins but was cut on September 2.
Veteran Quentin Harris spent his first four seasons with the Arizona Cardinals, tallying 85 tackles, one sack and one pick. He went to camp with the New York Giants but was released on the final cutdown.
A former second round pick, Michael Stone, also began his career with the Arizona Cardinals before catching on with the New England Patriots in 2005. He managed to net 46 tackles in 13 games for the Patriots and was in training camp with the Houston Texans this summer after signing with them in April. He was released by the Texans in September.
While all four were brought in, the Chargers opted not to sign any as of yet.
It is unclear whether they fear Terrence Kiel could be lost for some portion of the year after he plead not guilty to five felony charges of shipping and possession of large quantities of prescription cough syrup or Bhawoh Jue's injury is worse than initially feared.
Either way, the Chargers are preparing themselves for the unknown.