By Andrew Gould Jason Kelce and the Philadelphia Eagles aren’t accustomed to this much losing. After a 10-1 start, the Eagles have dropped three straight games. They followed back-to-back blowouts against the San Francisco 49ers and Dallas Cowboys by squandering a late lead to Drew Lock and the Seattle Seahawks on Monday night. Kelce responded to the losing streak during the latest New Heights podcast with his brother, Kansas City Chiefs tight end Travis Kelce. “Losing sucks, man,” Jason said. “It really does. We’re not playing the way we’re capable of playing.” The All-Pro center said it’s to…