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6/15/2013 2:30 P.M. ET

Sveum wants Jackson to develop consistency

NEW YORK -- While the Cubs might be looking to call up an outfielder in the near future, they might not be calling Brett Jackson's name just yet.

Jackson is hitting .232 with six home runs and 21 RBIs for Triple-A Iowa. Manager Dale Sveum said the team still wants to see more consistent at-bats from Jackson before calling him up to the Major Leagues.

The Cubs also want to continue to assess him against quality pitching, Sveum said.

"He's down there to develop and just be consistent," Sveum said. "More importantly, it's just the quality and the consistency on a daily basis swinging the bat -- instead of a day-to-day thing, like good, bad, good bad."

While Jackson might not be called up, Dave Sappelt could be brought back up to the Cubs to help fill in for David DeJesus, Sveum said. Sappelt is hitting .248 with two home runs 21 RBIs for Iowa.

Sappelt has played in 20 games for Chicago this season, and is hitting .178 (8-for-45).

Cubs activate Camp from 15-day disabled list

NEW YORK -- The Cubs activated relief pitcher Shawn Camp from the 15-day disabled list on Saturday.

Camp will fill the roster spot that opened up when Chicago placed center fielder David DeJesus on the 15-day DL. DeJesus sprained his right shoulder in the Cubs' 6-3 win over the Mets on Friday at Citi Field.

Camp was placed on the DL on May 22 with a right big toe sprain. While recovering from the injury, Camp made two rehab appearances for Class A Kane County.

He threw two scoreless innings on Friday night, and gave up one hit and had three strikeouts.

Cubs manager Dale Sveum said Camp is ready to pitch, though he likely won't be used on Saturday unless the team absolutely needs him because of his Friday outing.

"He's ready. Everything went good in his rehabs," Sveum said. "He threw really well yesterday and the time before -- his velocity is even up."

While they lost an outfielder with DeJesus' injury, the Cubs activated a pitcher to fill the roster spot since the bullpen has been used so much recently. Sveum said the team might call up an outfielder once the bullpen "gets back into shape."

Camp is 1-1 with a 7.56 ERA in 20 appearances for the Cubs this season. The right-hander pitched in 80 games last year, tied for the major-league lead, and went 3-6 with two saves and a 3.59 ERA.

DeJesus' injury leaves Cubs with a big void to fill

NEW YORK -- Chicago lost one of its most important players on Friday, and now has to figure out how to replace him in the lineup and on the field. That's not going to be easy, considering David DeJesus was a reliable all-around player for the Cubs.

"It's a guy that has one of the better OPS's [for] a leadoff hitter in the game," Cubs manager Dale Sveum said. "When you lose that, you're obviously losing a mainstay in your lineup."

Chicago placed DeJesus on the 15-day disabled list on Saturday, after he crashed into the wall trying to make a catch in the Cubs' 6-3 win over the Mets on Friday at Citi Field. DeJesus will fly home to Chicago on Sunday and will undergo an MRI on his sprained right shoulder on Monday.

At that point, the Cubs will have a better understanding of how much time DeJesus will need to miss. Sveum said the length of time he'll miss will likely be long enough that DeJesus will need to make a rehab appearance so he can get back to "game speed."

Sveum said Ryan Sweeney is likely to see most of the playing time in center field while DeJesus is out.

But it especially isn't easy to replace DeJesus at the top of the lineup. He was hitting .260 with six home runs and 21 RBIs at the time he was injured. Sveum said Sweeney or Luis Valbuena will likely replace DeJesus in the leadoff spot most of the time.

Sveum also said it will depend on who he wants hitting behind first baseman Anthony Rizzo in the fifth spot in the order.

What Sveum knows for sure, though, is the Cubs suffered a tough loss when DeJesus crashed into the center-field wall.

"Plus the defense he brings, leadership," Sveum said. "He brings all kinds of factors to the table."

Worth noting

• Cubs manager Dale Sveum said he expects to leave Anthony Rizzo in the fifth spot in the order.

Sveum dropped Rizzo down from the third spot on Friday, and Rizzo responded by going 3-for-4 against the Mets.

Nate Schierholtz moved from third to fifth, and went 1-for-4 with a home run. Schierholtz will continue to hit fifth against right-handed pitchers.

Chris Iseman is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.