Xavien Howard might be the kind of person who holds a grudge. This is based on his post-Week 1 comments about his former team, the Miami Dolphins, and specifically that team's quarterback, Tua Tagovailoa. The Indianapolis Colts' cornerback, though, knows what he speaks.
Howard spent his first eight seasons with the Dolphins, and, when healthy, was a very good player. He was a four-time Pro Bowler and one-time First-Team All-Pro. His job was to study the deficiencies of an offense, and he did that well. This also includes his own team in practice. The Colts signed Howard in the preseason.