Caleb Williams, Jim McMahon featured in Topps ad

Jim McMahon (right) supervises Caleb Williams’ autograph signing technique in a commercial for Topps Chrome trading cards.Topps

Bears quarterback Caleb Williams teamed with Bears Super Bowl-winning quarterback Jim McMahon on an ad for Topps Chrome trading cards.

In the ad, Williams is participating in the “Topps Autograph Laboratory” to work on autograph-signing technique. “The staff here has been incredible,” he says.

McMahon, as the “Topps VP of Player Development,” analyzes Williams’ ability. “Caleb’s talent jumps off the card.” McMahon says. “He’s got those “99" and “50s” down. But he’s just not ready for the superfractors yet.”

Williams works on his signing game and starts doing…