The fifth-round pick and fan favorite from the University of Wisconsin was scheduled to undergo more tests to determine whether his knee injury is a torn anterior cruciate ligament or some other issue that would end his season.
Receivers coach Edgar Bennett said late Friday afternoon that Abbrederis attended all of the team and position meetings despite not practicing Friday morning.
The 6-foot-1, 195-pound Abbrederis had been playing most as a slot receiver behind starter Randall Cobb and appeared to be off to a fast start in training camp.
"Outstanding in the classroom, does an exceptional job taking notes," Bennett said of Abbrederis. "He's a detailed guy. It reminds me of Randall when he first came in. Extremely detailed and able to take it from the classroom out to the practice field.
"During this time, this is more about improving our fundamentals and being fundamentally sound. You saw some of the things that we look for. You saw his creativity and his ability to create separation as a route-runner. Obviously he didn't practice today, but when he gets an opportunity to go back out there, we've got to continue to improve."