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If any players in Philadelphia hadn’t bought into Chip Kelly’s way of doing things after last season, the biggest event of this offseason made clear that they needed to get on board, or get out.

Eagles running back LeSean McCoy says that when Kelly cut receiver DeSean Jackson, it sent a message to the rest of the roster that if they weren’t conducting themselves the way Kelly wants his players to conduct themselves, then they wouldn’t be on the Eagles much longer.

“The whole DeSean Jackson thing, that helped out, to be honest, in making all the other guys aware,” McCoy told Albert Breer of NFL Network. “It’s all possible. They’ll cut one of your best guys if [he’s] not buying in. On any team — any team — you look at that, and as a player, you can look at it from so many different sides, but no matter how good you are, you gotta follow these guidelines. And if you don’t, you could be gone. . . . You gotta buy in.”

Kelly has a unique approach, not just with his fast-paced offense but with offseason conditioning work, practice, nutrition at training camp and more. McCoy says the players are on board with the whole package.

“Everybody’s definitely bought in — from the football training part of it to the weight room, and all the sports science types of things,” McCoy said. “Everybody’s bought in.”

If they hadn’t, they wouldn’t be there.