The Jacksonville Jaguars' 4-1 start, anchored by the NFL's second-ranked defense allowing just 14 points per game, has established clear separation in the AFC South and driven the market's 77% implied probability for the division title. Recent victories over the Eagles, Bengals, and Patriots, combined with a favorable early schedule, have widened the gap over the Colts at 2-3 and Texans at 1-4. Houston's first win against the winless Titans and trade acquisition of Marvin Harrison Jr. offer some momentum, yet the Jaguars hold a two-game lead entering their Week 6 neutral-site matchup in London. The Colts and Titans face steep deficits with inconsistent results and roster challenges limiting realistic contention for the crown.