Sources: Giants considering placing Sterling Shepard on season-ending IR due to concussion symptomsShepard's teammates are concerned the wideout may not be able to resume his NFL career11/6/2019, 9:40 PMSep 22, 2019; Tampa, FL, USA; New York Giants wide receiver Sterling Shepard (87) celebrates after scoring a touchdown against the Tampa Bay Buccaneers during the second half at Raymond James Stadium. Mandatory Credit: Kim Klement-USA TODAY Sports / Kim Klement