"It's definitely frustrating, man," McFadden said. "You always want to be out there taking plays and getting reps, but it's one of those things I'd rather sit out now instead of push it and have something linger on me."
The Cowboys signed McFadden to a two-year deal not long after losing DeMarco Murray to the Philadelphia Eagles. McFadden spent his first seven years with the Oakland Raiders and had just one 1,000-yard season and played 16 games once (2014).
The Cowboys are looking at McFadden, Joseph Randle, Lance Dunbar and Ryan Williams to replace Murray. Williams has been slowed the past two weeks with a sore knee and did his rehab on the side with McFadden.
McFadden has gone through individual work the past two weeks but he has not taken part in team and 7-on-7 drills. If he doesn't fully take part in next week's minicamp, he will have five weeks to get 100 percent healthy for the start of training camp.
The Cowboys arrive in Oxnard, California, on July 28 and will have their first practice July 30.
"I love being in camp," McFadden said. "It's the start of something that you really have to build on. So you want to get out there and work hard. It's going to be an exciting place. It's an exciting atmosphere, so I'm definitely looking forward to it."