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7/20/2013 1:20 A.M. ET

Qualls rejoins Marlins after birth of son

MILWAUKEE -- The Marlins' bullpen welcomed back right-hander Chad Qualls on Friday, four days after his wife gave birth to a baby boy.

The 34-year-old was placed on baseball's paternity list on July 13 and reinstated in time for the series opener at Milwaukee.

Cavin Chance Qualls was born on Monday.

The timing of the birth, which was during the All-Star Break, meant Qualls missed only two games -- Saturday and Sunday against the Nationals.

Qualls has been one of the Marlins' steadiest relievers, sporting a 2.89 ERA in 37 1/3 innings with 28 strikeouts.

Signed as a non-roster invitee in Spring Training, Qualls has been a reliable veteran on a youthful roster. He's also been the subject of trade rumors in recent weeks.

If he is moved by the July 31 non-waiver Trade Deadline, it won't be the first time.

A year ago, about five minutes before the deadline, he was sent from the Yankees to the Pirates. And in 2010, he also was dealt on July 31 from Arizona to Tampa Bay.

"Anything can happen," Qualls said. "If you've been around this game long enough, nothing surprises you. You take everything with a grain of salt and keep on moving on."

Qualls understands he could be on the move again, but he added he would like to remain in Miami.

"They have a really good chance to be good the next couple of years," Qualls said. "They've got a lot of pieces in this room right here. It's going to be fun to watch, whether I'm here or not.

"They only need a few extra pieces brought in, and they could be a really good ballclub. I'd like to be part of it, but like I said, who knows?"

Redmond hoping for improved offense in second half

MILWAUKEE -- As the second half begins, the Marlins will look to continually make strides in development and maturity.

The youthful squad has come of age since June 1, posting a 21-17 record after they were 14-41 in April and May.

The most pressing area in need of improvement, according to manager Mike Redmond, is the offense. Entering Friday's game in Milwaukee, Miami was last in the Major Leagues with 306 runs. The White Sox were the next closest at 345 runs.

The Marlins didn't improve on that mark on Friday, getting shut out for the 10th time this season in a 2-0 loss in Milwaukee. They hadn't been held scoreless since May 22 against the Phillies.

"I think our offense will continue to be a work in progress," Redmond said. "I think we all know we're capable of swinging the bats better than we did in the first half. There were times we swung the bats really well. But there were other times when we were just shut down."

The offense was hindered, especially early, with Giancarlo Stanton and Logan Morrison on the disabled list. With those two back, the team is hopeful to be more productive in the second half.

"I think we have guys around here who are capable of hitting for higher for average and driving in more runs, too," Redmond said. "Offense is probably the biggest spot where we need to really improve.

"I think that does come from [the fact that] we do have a core group of young guys who are either in their first year in the big leagues or new to the big leagues. There is that adjustment period. But at the same time, too, we have guys with a couple of hundred at-bats. We need to keep going, keep pushing. We'll always have to talk about approach, and swinging at strikes, and swinging at pitches we know we can handle."

Marlins being patient with Yelich, Marisnick

MILWAUKEE -- Performance will go a long way in deciding when touted prospects like Christian Yelich and Jake Marisnick are promoted to the big leagues.

Yelich, ranked by MLB.com as the 10th best prospect in the game, is Miami's No. 1 prospect. Marisnick is the Marlins' No. 2-ranked prospect.

The two outfielders are at Double-A Jacksonville. Yelich is expected to get the callup first, and that could come by the end of the month. Marisnick appears to need more time to refine his swing.

Ultimately, how they produce for Jacksonville will play into when they are brought up.

"A lot of that is dictated on how those guys are doing, and when we feel those guys are ready to come to the big leagues," Marlins manager Mike Redmond said. "We want to make sure the Yelichs and the Marisnicks are prepared to come to the big leagues. That's something that is ongoing, and we have discussions all the time.

"We want to make sure the timing is right. Yelich has been banged up this year. When we bring him, we want to make sure he is healthy and feeling good and confident. That's the most important thing."

Yelich, who went 2-for-2 with an RBI double in the Futures Game on Sunday, missed April with a right heel injury. And in early June, the 21-year-old went down with a strained abdominal muscle.

Marlins, Brewers to honor Negro Leagues

MILWAUKEE -- It will be a real throwback day for the Marlins on Saturday, as the club will sport uniforms from the 1956 Miami Marlins in a tribute to the Negro Leagues.

The Marlins and Milwaukee Brewers will each sport replica uniforms in their 7:10 p.m. ET game at Miller Park.

Miami's uniforms will feature a patch with the No. 29, the number worn by Hall of Fame pitcher Satchel Paige.

The legendary Paige spent three seasons -- 1956-58 -- with the Miami Marlins.

The Marlins of the 1950s were a Triple-A team in the International League. They played at Marlins Stadium, which later became a Spring Training home of the Baltimore Orioles.

The Brewers will wear reproductions of uniforms worn by the 1923 Milwaukee Bears, a member of the Negro National League.

Worth noting

• Chris Coghlan, on the disabled list since June 9, is doing light baseball activities in his recovery from right calf irritation. The nerve issue also is affecting his back. The 28-year-old is still a ways away from rejoining the Marlins. It could be at least another month.

• Utility infielder Chris Valaika, on the DL since May 8 after fracturing his left wrist, is rehabbing with Triple-A New Orleans.

• Matt Diaz, on the DL since May 20 with a left knee bone contusion, is not expected to return this season.

Joe Frisaro is a reporter for MLB.com. He writes a blog, called The Fish Pond. Follow him on Twitter @JoeFrisaro. This story was not subject to the approval of Major League Baseball or its clubs.