So says PhillyVoice.com stick figure man Jimmy Kempski:
Barnett joins a long list of Eagles players recovering from varying surgical procedures, including Carson Wentz, Jason Peters, Alshon Jeffery, Jordan Hicks, Timmy Jernigan, Darren Sproles, and Chris Maragos. Or at least Barnett did join the list of the wounded. According to the source, the recovery period is only six weeks, and the procedure should make that area of his body stronger. Do the math, and Barnett should already be recovered.