PHILADELPHIA — Even on a wet, blustery day, the Eagles found a way to stay hot. The team overcame a sluggish start to maintain its undefeated record, beating the Jacksonville Jaguars, 29-21, on a rain-soaked Sunday at Lincoln Financial Field. The Eagles (4-0) preserved their status as the lone undefeated team in the NFL against a Jaguars team led by former Eagles coach Doug Pederson. The Jaguars that came into the weekend with two straight impressive wins but were held in check for most of Sunday. The weather conditions affected both sides, but the Eagles offense was dominant on the ground. Th…