Jeffrey is scoreless in six games this season, but he still might be dealing with the effects of March surgery to repair torn ligaments in his right knee.
Bylsma told the Pittsburgh Tribune-Review that the conditioning assignment was not performance based; rather, it's because Jeffrey needed to get into game situations that weren't available when the Penguins were a fully healthy team.
I'm very excited about what happened today. We've worked on this deal with Toronto for a month, or over a month. It got a little bit of legs on draft day, but it really heated up last night, and we were able to complete the deal today.
— Penguins GM Jim Rutherford on Phil Kessel, who he acquired from the Maple Leafs in a trade on Wednesday