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8/10/2014 8:17 P.M. ET

Plouffe, Arcia sit out with minor injuries

OAKLAND -- Twins third baseman Trevor Plouffe and outfielder Oswaldo Arcia were both held out of the lineup against the A's on Sunday due to injury.

Plouffe fouled a ball off his left foot in his first at-bat in Saturday's game but remained in the game. His foot felt progressively worse as the game went along and he got precautionary X-rays Sunday that came back negative. Plouffe said he doesn't believe the injury is serious and he's listed as day to day.

"It's pretty sore today," Plouffe said. "I wouldn't be 100 percent to play today. But I don't think it's anything more than that. It's a bruise."

Arcia, meanwhile, said he tweaked his lower back while taking a swing in his final at-bat in Friday's game against the A's. He tried to take batting practice in the cage before Sunday's game, but he still had issues with his back and could hit the 15-day disabled list Monday if it doesn't improve.

"It's a little bit sore," Arcia said. "It feels better today."

With Plouffe out, Eduardo Nunez made the start at third base, while Chris Parmelee started in Arcia's place in right field.

Mauer on his way to Houston to rejoin team

OAKLAND -- First baseman Joe Mauer got through his rehab assignment with Class A Cedar Rapids without any issues and remains on track to be activated from the 15-day disabled list to rejoin the Twins on Monday in Houston.

Mauer, who has been on the DL with a strained right oblique since July 2, went 2-for-4 Saturday while playing nine innings at first base for a second straight game. Mauer hit .400 (6-for-15) in four games with Cedar Rapids and wasn't in the lineup Sunday, as he was traveling to Houston.

The Twins, however, will wait until Monday to activate Mauer from the DL. The Twins are still determining their corresponding roster move, as there's still a chance outfielder Oswaldo Arcia will need to be placed on the 15-day disabled list with lower back soreness. Arcia tried to hit in the batting cage before Sunday's game but still had issues with his back.

"We'll get to Houston and see which way we're going," Twins manager Ron Gardenhire said.

Right-hander Ricky Nolasco is also expected to be activated from the DL in the coming days, as he finished his rehab assignment with Cedar Rapids on Sunday. The right-hander went 5 2/3 innings, giving up three runs on eight hits. He also struck out six and didn't walk a batter.

Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.