Jaguars head coach Jack Del Rio has gone for it on fourth down more than any head coach in the NFL this season, successfully converting 13-of-22 chances (59 percent). However, in 4th-and-1 situations, the Jags have a 57.1 percent conversion rate compared to the league average of 66.5 percent. In Week 15 against the Colts, with his team trailing 14-10 early in the third quarter, Del Rio elected to roll the dice on 4th-and-1 at the Jaguars' 39-yard line. The play-call was a toss right for Maurice Jones-Drew, but he fumbled the toss and lost yardage, turning the ball over on downs. Colts RB Donald Brown scored on a 43-yard TD scamper two plays later and Indy never trailed the rest of the way. Considering that the Colts — who had scored only 14 points in the first half and were missing WR Austin Collie, who accounted for both TDs before suffering a concussion — had a 33.5 percent chance of taking over on downs in Jaguars' territory, the decision to go for it was a poorly calculated risk by Del Rio.