"It was a shock," DeWitt said before Sunday's 8-7 loss. "I've been with the [Dodgers] for awhile and like everybody told me, the first time you are traded is always the toughest."
DeWitt is looking forward to his first Wrigley Field game as a home player on Monday against the Milwaukee Brewers.
"I really couldn't be more excited about this opportunity. Great organization, great city and great baseball," DeWitt said.
DeWitt, 24, has high hopes for the Cubs and his newfound opportunity to play everyday in Chicago.
"It's a great organization," said DeWitt, a first-round draft pick by the Dodgers in 2004. "It's an organization definitely committed to winning and has a bright future. It's a great opportunity to help this ballclub as well. Whatever way that is, whatever role, I'm willing to do it."
DeWitt got some advice from Dodger teammate Reed Johnson, who played for the Cubs from 2008-09.
"He talked about how much he loved the city, the fans and players," said DeWitt, who entered Sunday batting .270 with one home run and 30 RBIs this season. "He had nothing but good things to say about [Chicago]."
Johnson told DeWitt to get used to day games and the adjustments that go along with it.
"He said that it takes some getting used to but it's a part of it," DeWitt said.
Bruce Levine covers baseball for ESPNChicago.com and ESPN 1000.