"This wasn't just some throwaway signing," a source said. "Matt really believes this kid can play."
Walker failed to appear in an NFL game in his first three years out of Temple, mostly spending time with the Indianapolis Colts practice squad. He finally got a chance to play for the XFL last spring, and he signed with Carolina in the offseason amid interest from six other teams.
An injury to starter Teddy Bridgewater pushed Walker to the field last Sunday, and he led the team to a 20-0 win over the Detroit Lions. The 25-year-old threw two interceptions but also added 258 passing yards and one touchdown, completing 70.6 percent of his passes.
Bridgewater is set to return in Week 12, but Walker showed his upside last start and could be a factor for Carolina going forward. The quarterback is signed through 2021 and will be a restricted free agent in 2022.