Jim Caldwell has never been viewed as the most daring of NFL sideline men, but Trey Lyles Jersey a new study tells us perhaps it's time to take a different look at the coach.Football Outsiders i sued its annual , and Caldwell kept his offense on the field more often on fourth down than any coach in the NFL. The went for it 14 times in 107 qualifying fourth-down situations. That's 13.1 percent of the time, tops among NFL coaches.Erstwhile coach Marc Trestman was second behind Caldwell, going for it on 12.8 percent of opportunities.While Caldwell and Trestman showed plenty of onions in 2014, the title of the NFL's most aggre sive coach goes to Sean Peyton. The Aggre sivene s Index was founded in 2006, as a way to -- according to Football Outsiders -- "rank coaches based on their tendencies on fourth downs in a manner that was easy to understand but accounted for the different rates at which the average coach will choose to 'go for it' in different situations." The index excludes obvious catch-up situations in the third and fourth quarter to give a more accurate representation of a coach's gunslinger mentality.We suggest you read the full article, which lays out specific examples of how Payton, Caldwell and Trestman got aggre sive in 2014.And who was the least aggre sive coach last season? That would be former coach Mike Smith, who finished well behind Jeff Fisher at the bottom of the list. This might be the least surprising thing you'll read all day.The latest Podcast and debates if you'd trade for . Find more content on . Luka Samanic Jersey