CHARLOTTE, N.C. (AP) — Joe Gibbs said he was shocked when he learned the NFL is investigating whether the New England Patriots deflated footballs to gain an advantage over the Indianapolis Colts in the AFC championship game. The Patriots reached the Super Bowl on Jan. 18 with a 45-7 win over the Colts. [...] the NFL says evidence shows the Patriots used underinflated footballs during the first half of the game; softer footballs would in theory be easier to throw and catch.