Ristolainen is expected to miss roughly two weeks with an upper-body injury, reports the Olean Times Herald.

EDGE Analysis

It's a minor setback for Buffalo's blue-chip defenseman, though no other details have been made available. He's expected to be one of Buffalo's top-four defenseman and certainly has the most upside among Zach Bogosian, Josh Gorges and Cody Franson. Ristolainen will likely rejoin the Sabres during the final week of training camp.