Johnson was signed as a free agent by the Saskatchewan Roughriders in 2006, and dressed for a total of 15 games, starting seven at cornerback.

His college coach had sent a videotape to former Riders general manager Roy Shivers.

"[1] Johnson was named the Most Valuable Player of the 95th Grey Cup on Nov 25, 2007 after intercepting a record three passes, including one for a 30-yard touchdown.

His defensive efforts helped lead the Saskatchewan Roughriders to a 23–19 victory over their CFL Prairie rival Winnipeg Blue Bombers.

[2] It was the first time since 1994 that a defensive player was awarded the Grey Cup's top individual title.