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9/11/2013 8:07 P.M. ET

Mauer has first setback since concussion

Twins catcher shuts down workout early, sent home from Target Field

MINNEAPOLIS -- Twins catcher Joe Mauer had to shut down his workout early Wednesday as he felt concussion-like symptoms and was sent home from Target Field.

It was the first setback for Mauer since suffering a concussion Aug. 19, when he was hit by a foul tip while catching against the Mets.

Mauer took batting practice on the field over the weekend, but worked out inside Tuesday and Wednesday. But Wednesday was the first time that Mauer had to shut it down early, according to Twins general manager Terry Ryan.

"He didn't have a good day," Ryan said. "It's a concern more than frustration. You've got to feel for the guy. He just didn't feel good today so we sent him home. This wasn't a good day and I don't want to hide that at all. So he's home and hopefully he comes back tomorrow feeling better and he'll get back on track here."

Buxton Baseball America's top Minor League player

MINNEAPOLIS -- Twins top prospect Byron Buxton added to his accolades this season, as he was named Baseball America's Minor League Player of the Year on Wednesday.

Buxton, ranked as the No. 1 overall prospect by MLB.com, beat out other top prospects including Twins third-base prospect Miguel Sano, the Rangers' Joey Gallo and the Astros' George Springer.

Buxton, 19, dominated both levels of Class A, hitting a combined .334/.424/.520 with 12 homers, 18 triples, 19 doubles, 77 RBIs and 55 stolen bases in 125 games.

The five-tool center fielder hit .341/.431/.559 with eight homers, 15 doubles, 10 triples and 32 stolen bases in 68 games at Class A Cedar Rapids en route to being the MVP of the Midwest League before getting the promotion to Class A Advanced Fort Myers in late June. He proceeded to hit .326/.415/.472 with four homers, four doubles, eight triples and 23 stolen bases in 57 games at Fort Myers despite being one of the youngest players in the Florida State League.

"My thoughts are about as positive as can be," Twins general manager Terry Ryan said. "It's a tremendous honor. Baseball America has a lot of credibility when it comes to prospects and Minor League baseball. Byron had a tremendous year at two different levels. He's only 19, so you don't get those awards too many times at that level."

Buxton, who is set to play in the Arizona Fall League, joins Twins catcher Joe Mauer as the only two players in franchise history to win Minor League Player of the Year honors from Baseball America. Recent winners include Wil Myers (2012), Mike Trout ('11), Jeremy Hellickson ('10), Jason Heyward ('09) and Matt Wieters ('08).

"It's pretty exciting," Twins manager Ron Gardenhire said. "I've been told that by a few people before it was announced that he was the best player they'd seen. Tom Kelly told me he was the fastest player he'd ever seen, which shocked me because T.K. has seen a lot of baserunners and we've seen a lot of guys who can really run.

"So for him to make that statement was pretty cool. And I've had a lot of people, who usually don't tell me those things, they think he's the best player they've ever seen in the Minor Leagues."

Twins remember 9/11 victims on 12th anniversary

MINNEAPOLIS -- The Twins honored those who lost their lives in the attacks on the World Trade Center and the Pentagon on Sept. 11, 2011, before Wednesday night's game against the A's.

Before the singing of the national anthem, the stadium observed a moment of silence to remember the victims on the 12th anniversary of the attacks.

Marine veteran Jesse Kurtz performed the ceremonial flag raising during the singing of the national anthem.

Kurtz was a Marine from 1970-73, seeing action in the Vietnam War. Kurtz resides in Stillwater, Minn., and is the manager of the Stillwater American Legion.

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.