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8/29/2013 7:37 P.M. ET

Webb hit in back during batting-practice mishap

WASHINGTON -- Marlins reliever Ryan Webb was hit in the back by a line drive during the Nationals' batting practice on Thursday. A team spokesman said that the righty had only sustained a bruise.

Webb was stretching with the rest of the team along the third-base line when Nationals reserve outfielder Scott Hairston hit him with a foul ball. Hairston walked over to check on Webb as the reliever was escorted to the dugout by a team trainer. Hairston and Webb were teammates in San Diego in 2010.

The incident occurred in the middle of manager Mike Redmond's pregame news conference in the visitors' dugout. Redmond said that Webb was already probably going to be unavailable for Thursday night's game after pitching 3 1/3 innings following a rain delay the night before.

Marlins call up Dyson to add fresh arm to 'pen

WASHINGTON -- The excitement came all at once for Sam Dyson on Wednesday night. As Triple-A New Orleans won a game on a walk-off home run in the 11th inning, Dyson was told that he was being called up to the Marlins.

"I was pretty shocked," Dyson said Thursday. "I was just doing the chart, we're in extra innings, and they told me to come to the clubhouse. I showed up, and as I was walking down, we hit a walk-off. It was pretty exciting both ways."

Dyson joined the Marlins for their series finale against the Nationals after Arquimedes Caminero was optioned to Triple-A on Wednesday night. Dyson was 1-3 with a 2.61 ERA in five starts this season for the Zephyrs.

Manager Mike Redmond said that he made the move to put another fresh arm in his bullpen after a 72-minute rain delay on Wednesday night.

"We felt like we want to make sure we're covered out there in the bullpen," Redmond said. "Dyson's here and he gives us kind of that long man we talked about that we didn't have before, a guy that has been starting so he's able to give us multiple innings, which is nice to have."

Dyson was previously in the Blue Jays' organization, where he pitched two-thirds of an inning for the Major League squad last year. The Marlins claimed the 25-year-old off waivers in January and have primarily used him as a starter this season in the Minors. Dyson has worked hard to develop a breaking ball to complement his fastball and changeup.

Dyson didn't expect to be called up until Sunday -- when rosters can expand -- if at all this season. After allowing three runs in two-thirds of an inning during his first stint, he's excited to be back in the Major Leagues -- and have a chance to hopefully lower his 40.50 ERA.

"You can cut it in half pretty quick," Dyson said.

Redmond uses all-right-handed lineup vs. lefty Gio

WASHINGTON -- Manager Mike Redmond shook up the Marlins' lineup Wednesday, and the team recorded double-digit hits for the first time in more than a week. So on Thursday, he kept shaking.

With left-hander Gio Gonzalez on the mound, Redmond started an all right-handed lineup for Thursday night's series finale against the Nationals. The Marlins' skipper put Donovan Solano at the top of the order for just the second time this season, and bumped Justin Ruggiano -- who led off on Wednesday -- to the cleanup spot.

"We're just going to keep mixing and matching until we find one that works," Redmond said. "We've been trying since April 1, right?"

The changes were made in part to rest Christian Yelich and Logan Morrison, both left-handed hitters, with a southpaw on the mound. But Redmond also said that he wants to use the final month of the season to evaluate players at different spots in the lineup.

"We're at a point in the season where I think we have the chance and the ability to try different things and try different guys in different situations," Redmond said. "Not only to help us win a ballgame, but for down the road, to see where guys are going to fit."

Worth noting

• Starter Henderson Alvarez only pitched 1 2/3 innings on Wednesday night before the game was delayed by rain. Redmond wasn't sure if the abbreviated start would affect Alvarez's next turn in the rotation.

"He didn't throw that many pitches, but he did throw a couple times warming up down below," Redmond said. "So we'll just kind of monitor him today, see how he feels and then we'll figure out where we can re-insert him into the rotation."

• Chris Coghlan went 2-for-3 with a double and two walks in his first game at Triple-A New Orleans on Wednesday night. Redmond said Coghlan will likely rejoin the Marlins on Sunday.

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