GREEN BAY, Wis. -- Perhaps the most eye-catching play on the opening day of Green Bay Packers' training camp was noteworthy for two reasons: Rookie cornerback LaDarius Gunter made another big play, and second-year receiver Jared Abbrederis got hurt.

Gunter, the undrafted free agent from Miami (Fla.), picked off an Aaron Rodgers pass down the left sideline, showing off the coverage skills he first flashed during the organized team activities and minicamp practices this spring.

Mike McCarthy and the Packers opened camp with a short injury list, and hope to keep it that way. Jeff Haynes/AP Images for Panini

In the process, however, Abbrederis fell hard and was taken off the field. He did not return.

However, coach Mike McCarthy said he did not think it was related to the knee injury that ruined Abbrederis' rookie season last year. Abbrederis, a fifth-round pick from Wisconsin in 2014 and a local favorite, tore an ACL early in training camp last summer and spent the entire season on injured reserve.

"Jared's being evaluated right now," McCarthy said after practice. "He fell pretty hard on the interception. I'm not quite sure what they're looking at. So I don't know if it's a tailbone or what it is."

The Packers' medical report to start training camp was short, and McCarthy clearly hopes it stays that way.

The only other issue to come up on Thursday was with cornerback Sam Shields, who dropped out of practice briefly with what was originally thought to be an ankle injury but turned out to be an equipment problem with his shoes.

In non-medical news, McCarthy said tight end Andrew Quarless will be away from the team indefinitely while dealing with a family issue. It is unrelated to his arrest last month in Florida.

"I do not have a feel for when he will be back," McCarthy said. "He's dealing with a very difficult, extremely difficult family situation right now. So he's with his family, and he'll be gone as long as he needs to be."