Sanders is taking first-team reps at Thursday's practice, Scott Petrak of the Elyria Chronicle-Telegram reports.
Deshaun Watson took all the first-team reps Wednesday, while Thursday marks Sanders' turn to work with the starters as the Browns evaluate their quarterbacks in training camp. A regular-season starter between Watson or Sanders is unlikely to be determined until after both players have had a chance to make their case in game action during the preseason.