By STEVE REED
AP Sports Writer
CHARLOTTE, N.C. (AP) — Kalon “Boogie” Barnes is a flat-out burner. The biggest question facing the Carolina Panthers rookie cornerback is whether his elite speed translates to a successful NFL career. Barnes ran a 4.23 40-yard dash at the NFL scouting combine in February — the fastest time ever recorded by a defensive back since the NFL Network began broadcasting the event in 2003. It’s also the second-fastest time of any player, finishing one one-hundredth of a second behind wide receiver John Ross, who set the combine record in 2017.