The internal kinematics of star-forming galaxies are an ideal probe of the structural evolution of disks over time. Detailed observations of local galaxies constrain the late-time nature of disks, but observations at earlier times are necessary to determine the physical mechanisms behind the structural growth of star-forming galaxies. Recent near-infrared multi1object spectrographs allow us to probe the physical structure of large samples of galaxies at z~2, when galaxies were most rapidly forming their stellar mass. I present gas kinematics of star-forming galaxies at z~2 from the MOSFIRE Deep Evolution Field (MOSDEF) survey combined with structural measurements from HST/CANDELS imaging. We use forward modeling of gas kinematics observed with fixed-angle multi1object spectrographs to measure the kinematics and dynamical masses for galaxies both with and without detected rotation. By comparing the dynamical and baryonic (stellar + gas) masses, we constrain the physical structure (i.e., V/σ) of galaxies for which we do not resolve rotation. Finally, I present mock observations constructed from the MassiveFIRE (Feedback in Realistic Environments) simulation, allowing us to test how well we recover kinematic properties of star1forming galaxies with MOSDEF and from future observations with JWST.