By JOE REEDY
AP Sports Writer
COSTA MESA, Calif. (AP) — For nearly six months, Tom Telesco has heard how good the Los Angeles Chargers look on paper with one of the league’s top young quarterbacks and after aggressively addressing the defense in the offseason. Telesco realizes the ultimate indicator is how the team he has built performs on the field. Telesco goes into his 10th season as general manager after spending $218 million during free agency with most of that devoted to upgrading a defense that was ranked 23rd last season. Los Angeles’ key moves were signing cornerback J.C. Jackson and acquiring linebacker Khalil Mack from the Chicago Bears.