GREEN BAY -- As the Packers prepared to hit the practice field Wednesday for their longest workout of the week, and perhaps their longest of camp, Head Coach Mike McCarthy couldn't emphasize enough how important this stretch of August is.

"Let's not lose sight of the fact we are in training camp," McCarthy said Wednesday morning. "These practices are critical to our growth and development. It gives us a chance to work on fundamentals and techniques.

"This is an in-season Thursday. We call it our workload day, when we do the majority of our heavy lifting."

Green Bay's injury list got a little longer on Tuesday, as rookie S Josh Jones got stepped on and left with an ankle injury. S Jermaine Whitehead and TE Aaron Peck also dropped out of practice, and RB Ty Montgomery (lower body) did not practice.

McCarthy did not get into any injury specifics prior to Wednesday's workout. With Montgomery, he said the starting running back is "working through it."

Different skill-position players continue to jump out on different days, and McCarthy mentioned undrafted rookie WR Montay Crockett as a player who had an impressive practice on Tuesday.

Packers.com will have more following practice and locker room interviews.