MILWAUKEE -- Cubs pitcher Kerry Wood did not make the trip to Miller Park but stayed in Chicago to deal with flu-like symptoms, manager Mike Quade said on Tuesday.

Wood was too ill to get on the team bus to Milwaukee for the start of the Cubs' three-game series against the Brewers.

Jeff Samardzija will likely fill Wood's role as the right-handed setup pitcher.

Meanwhile, catcher Koyie Hill, who had similar symptoms on Sunday, was back and healthy.

"I'll be glad if we can get out of here with no one else sick," Quade said.

However, the Cubs were without outfielder Reed Johnson, whose back was stiff and sore, which made him unavailable on Sunday.

"Right now, it's OK," Johnson said of his back. "I'll probably give it a day or so and make sure it's moving in the right direction and if not, then we'll have to make a decision as to what to do with me. If things keep moving in the right direction, then I won't have to go on the [disabled list]. That's always the goal."

Johnson already has gone on the DL because of back spasms this year.

DeJesus: Castro, Barney will improve

MILWAUKEE -- Starlin Castro and Darwin Barney are getting better, Ivan DeJesus said on Tuesday, and the Cubs' infield coach said he expects them to respond well to recent criticism by manager Mike Quade.

After Castro missed a popup in the first inning on July 20 by the Phillies' Michael Martinez, Quade said that play set a "bad tone" for the rest of the game, which the Cubs lost, 9-1. DeJesus said the two young middle infielders have taken that as a challenge.

"That's the only way you can look at it," DeJesus said. "I say, you improve when positive things happen. It has to become a habit, and a good habit."

Castro, Barney and DeJesus prepare together before every game. The coach said the problem is not lack of work.

"We work before practice, we talk a lot during batting practice, we talk a lot during the game, we talk a lot after the game about the mistakes they made, how they could adjust better, what they could do better," DeJesus said of the Cubs' shortstop and second baseman.

"They'll get better with experience," he said. "They get the ground balls, they get the double plays. Sometimes, it's not how much you do it, but it's the quality of the ground balls. They've been doing that real well."

Remember, he said, Castro and Barney didn't play together in the Minor Leagues. Barney was a shortstop in the Minors. DeJesus can hit fungoes forever. But he can't hold their hands on the field.

"During the game, they're by themselves," DeJesus said. "When you [practice] the right way every single time, it becomes part of your game and becomes natural. They need to do that during the game. Out there, they're by themselves. They need to prepare themselves. That's what we teach -- is to prepare them. When the game starts, it has to click and you have to do the things you're working on."

Cubs participate in Santo golf tournament

MILWAUKEE -- Cubs manager Mike Quade and several of the players took part in the 15th annual Ron Santo golf tournament on Monday to benefit the Juvenile Diabetes Research Foundation.

Quade said he didn't golf but rode in a cart around the Kemper Lakes course with Santo's wife, Vickie, and "antagonized" the other golfers. Santo, the popular Cubs radio broadcaster and third baseman, died in December 2010.

Among the players who took part in the golf outing were pitchers Ryan Dempster, Kerry Wood, Jeff Samardzija, John Grabow, John Russell, Randy Wells and Sean Marshall, and second baseman Darwin Barney.

The Cubs will unveil a statue of Santo at Wrigley Field on Aug. 10.