Mike McMahon will be the quarterback to start the second quarter, and
Jackson, the Vikings' second-round pick, will likely finish the first half and play through the third quarter. J.T. O'Sullivan will finish the game.
Jackson was not available for comment following Sunday's 20-minute mock game, which focused on situational substituting to prepare for Monday.
The players were able to leave training camp following the practice and report to a Twin Cities hotel later at night.
The only player who is not available to play Monday is rookie cornerback Charles Gordon, who is expected to miss at least one more week following arthroscopic surgery to repair cartilage damage to his knee.
Rookie linebacker Chad Greenway said he's more excited than nervous to make his professional debut. The No. 1 pick from Iowa said he'll work with the second unit at weakside linebacker, though he'll get thrown in with the starters on some of the defensive packages.
"They want to keep it simple and let us get out there and fly around," Greenway said.
Greenway said his parents and wife Jennifer will attend the game.
Greg Blue is among the rookies who'll make their professional debut
Monday, and the hard-hitting backup safety is expecting to continue his strong training camp.
"The first game is an opportunity to make my mark," he said. "I just have to play hard and make no mistakes."
Offensive lineman Ryan Cook said this is a day he's waited a long time for.
"It's bigger than college," Cook said. "College was fun, but this is a chance to compete at the highest level."
Childress said the game plan is simple for Monday, and he's interested to see which players can react appropriately in game conditions against another opponent. "Some guys do funny things in competition," he said.