The Wautoma native and former Wisconsin Badger took to his Twitter account to confirm the news, calling the injury "a small setback."
"It will only make me stronger, and I cannot wait to get back on the field with my team!" he tweeted.
Abbrederis missed practice on Friday, the first time he had missed practice all year. The team would only say he had a knee injury.
The fifth-round draft choice was competing for a roster spot in training camp.