"I'm not joking," Kelly said.
"We've got to do a better job. We left the ball on the ground too much - we didn't get the ball to the officials" so they could spot it for the next play.
"That's one of our goals, and that's something we've got to get better at," tight end Brent Celek said. "Whoever has the ball, makes sure the ref gets it."
The Redskins certainly seemed to feel the Eagles were going plenty fast. LeSean McCoy, whose career-high 31 carries netted 184 yards, told of seeing defensive linemen just starting to ease down into their stances as the Eagles snapped the ball. That's literally being back on your heels.
"It makes both run-blocking and pass-blocking easier when the guy's not ready to go," center Jason Kelce said yesterday. "The defense has an advantage when they have time to comprehend and process the situation, the down and distance, the personnel, the formation."
But can the Eagles really get faster? Can they even sustain this pace over 16 NFL games?
"I'm 25," McCoy said, as he sauntered toward the parking lot after a brief film session. A reporter had asked if he felt tired.
"Every time we do this, your body is advancing and becoming more in shape," said left guard Evan Mathis. "When we first started on this, it was way harder. Each time we do it, it's going to get easier. [Monday night] I felt the best I've felt of all the games. Some of the preseason games, you'd get really winded, but we improved."
"Honestly, I feel good today," Celek said. "As long as we take care of our sleep, our hydration, and all that stuff, I think we'll be OK."
Asked if he thought the Eagles got tired in the fourth quarter, when the Redskins came back, Kelly said: "Yeah. But I think you always have fatigue in the fourth quarter, no matter what team you're on, what you did. You've played a game. So you're not going to be as fresh in the fourth quarter as you were in the first quarter. The biggest thing is to not be as tired as the team you're playing against."
The Eagles definitely were not as winded as the Redskins. Still, Kelly said he thinks he can keep his team fresher by distributing the reps more evenly. Maybe Bryce Brown, if you trust him not to fumble, could handle more than Monday night's nine carries (for 25 yards). Maybe a Chris Polk carry here or there would not be a bad thing. Maybe Damaris Johnson is worthy of more than one wideout snap. Kelly mentioned doing a better rotational job at those positions.
"When you're going to play that many snaps, you've got to make sure you don't run your own team into the ground," Kelly said. "That's kind of getting those guys subbed in and out. There were times they didn't want to come out. They've got to understand, if we're going to get that many snaps, we need to make sure we manage it so when we're in the fourth quarter, we're fresher."
Kelly was asked if the Eagles are in better shape than everyone else.
"I don't know," he said. "It would be very presumptuous of me to talk about the shape of other teams because I've never watched them train. I know our team is in shape. I know how we train. We're very specific in how we do that. We can keep up what we're doing right now because we've been doing this since April."
Two mild surprises from Monday night were that defensive lineman Vinny Curry was inactive after a strong preseason, and tight end James Casey played only on special teams until getting two meaningless snaps near the end of the game.
Curry and Casey said what you'd expect yesterday - the win trumps everything, but, yeah, they want and expect to get chances to play.
"I was very surprised," said Curry, a second-round pick in 2012. "It was the call the staff came up with. We got the win. That's all that matters."
Chip Kelly said Curry was inactive because the Eagles activated only six defensive linemen. That number included undrafted rookie Damion Square, who got 14 snaps.
Casey, signed in the offseason for $12 million over 3 years, will have to wait for a game where the Eagles run more three-tight-end sets, Kelly indicated.
"Sometimes we're going to feature three tight ends prominently, and other times we're going to be a little bit more spread," Kelly said. "[Monday] night we were a little bit more spread."
Casey acknowledged that his role changed when, after signing him, the Eagles ended up drafting tight end Zach Ertz in the second round. Ertz took the field for 26 offensive snaps Monday night.
"Of course I signed here expecting to play and to get opportunities and to be on the field playing offensively, but then they drafted Ertz at the top of the second round, so he's of course going to get some opportunities," Casey said. "He's a great player, Brent [Celek]'s a great player, I feel like I'm a really good player.
"I'm never going to be a guy who causes problems in the locker room or anything like that. They know I want to play. Everybody wants to play."
Chip Kelly said starting cornerback Bradley Fletcher suffered a concussion against the Redskins. It seems unlikely he will play this week. The Eagles brought back corner Brandon Hughes, as planned, having managed to make sure his year's salary wasn't guaranteed, by keeping him off the Game 1 roster. Kelly said Hughes, who has a broken hand, should be able to practice today . . . Among the bells and whistles Kelly rolled out for his debut was an unbalanced line, with right tackle Lane Johnson and left tackle Jason Peters on the same side. "They were just tired and we didn't want them to run back to the ball," Kelly joked. "We told them to hang out out there."
On Twitter: @LesBowen