J.J. McCarthy joins the Giants with an unclear path to being their starting quarterback

J.J. McCarthy took the field with the New York Giants on Wednesday in his new No. 18 jersey, practicing for the first time since getting traded from Minnesota.

When he gets into a game is anyone’s guess.

Coach John Harbaugh has said repeatedly that Jameis Winston will start at quarterback Sunday against Arizona. The big question now is how long Winston will remain in that role.

Giving up a fifth-round pick after losing Jaxson Dart and linebacker Brian Burns to season-ending knee injuries suggests the coaching staff and front office believe McCarthy can make a difference. They’re not tipping the...