"We're not hoping to just move players for prospects," he said.

In the first two games, you move players in and out a lot.

Any other questionable situation, he added, could be solved by moving players to different positions.

The runners have to know his blocking style, which way he tends to move defensive players.

"When you're moving players from one place to another," Jackson said, "you need even greater vigilance."

Defenses might move extra players to that side or shift the whole defense to compensate.

Moving offensive players farther apart serves the purpose of also spreading the defense.

The real economic force here is a technology that is moving new players into the market.

Rieber later recalled: "Detroit really moved players around a lot."

We just needed to move and get bigger players at that time.