Scott, who has been on the disabled list since June 15 (retroactive to June 9) with back stiffness, said on Saturday that he thought he needed a short rehab assignment to get his swing right.
"I've got to be honest with myself," Scott said. "... I know I'm not on the fastball. I'm not repeating good swings."
There had been speculation that Scott would be ready to be activated when the club went to Kansas City on Monday to begin a three-game series with the Royals. Instead, he will be the Bulls' designated hitter on Monday and Tuesday.
Scott explained the importance of being able to be "on the fastball."
"If I'm on the fastball and able to put consistent swings on the fastball, I can adjust to the breaking stuff," Scott said. "... Right now, I just want to get to where I'm capable of doing a good job."