Desmond Bishop remembers it well: how helpless he felt sitting out of the Green Bay Packers' 45-31 loss in the NFC divisional playoffs watching as Colin Kaepernick shredded the Packers' defense for 579 yards with an offense that Bishop now a member of the Minnesota Vikings said his old team wasn't ready to face.

"I remember a lot of confusion" Bishop said. "We really weren't prepared for it. That was really his coming-out party."

Kaepernick's performance against the Packers sent talk about the read-option offense to a fever pitch around the game. And even if Bishop didn't get the experience of facing Kaepernick -- he missed all of last season with a torn hamstring -- the game ensured he and the rest of the league would be studying it plenty before this season.

The Vikings haven't played San Francisco since Week 3 last season when Alex Smith was still the quarterback. And other than a Week 6 loss to the Washington Redskins -- where Robert Griffin III passed for 182 yards and ran for 138 more -- the Vikings' defense has yet to see a heavy dose of the read-option.

That will change this season when Minnesota faces four teams in a nine-week span that are all likely to run some form of the read-option. That means their third preseason game against the 49ers and Kaepernick -- a game in which both teams' starters will likely play the entire first half -- might double as a refresher course on the NFL's trendiest offense.