Johnson recorded 11 tackles (five solo) and two passes defensed during Sunday's 27-13 loss at Las Vegas.
Johnson was on the field for all 68 of the Dolphins' defensive snaps in Week 1, and he was second in tackles behind only fellow rookie Jacob Rodriguez. It might still be early to declare him a reliable IDP option, but he'll be worth keeping an eye on in a Week 2 tilt at San Francisco.