The Penguins assigned defenseman Ryan Shea to AHL Wilkes-Barre/Scranton last night, per CapFriendly. The move ends his brief emergency loan, having come up on Friday after blue-liner Ryan Graves was diagnosed with a concussion. However, his services weren’t needed in Saturday’s 4-3 shootout loss to the Blue Jackets, meaning he needed to be returned to the minors or converted to a standard recall. The 27-year-old has been up and down on multiple paper transactions over the last few months but hasn’t played an NHL game since Dec. 8. The 2015 fourth-round pick of the Blackhawks made his NHL debut this season after inking a one-year, one-way deal with Pittsburgh last summer, but failed to record a point and averaged 12:28 per game through 22 contests.