The arbitrator's decision last week to overturn Braun's suspension marked the first successful appeal of a suspension under Major League Baseball's anti-drug policy.
Major League Baseball's executive vice president for labor relations, Rob Manfred, roundly rejected Braun's accusations, though he said some changes may be made in the testing process.
Later, Yahoo Sports reported that 2011 NL MVP Ryan Braun's name also appeared in the records.
The committee did not vote Friday to report Moseley-Braun's nomination to the full Senate.
Should Moseley-Braun's nomination be approved by the committee, the full Senate could take up the question by Wednesday.
Braun's teammates sat in the stands, in uniform, as he held a news conference on the field at the team's training complex.
WSJ: Ryan Braun, Milwaukee Brewers Slugger, Says 'Truth Prevailed' - MLB
Paul Coverdell (R-Georgia), who described the accusations and looming ethics questions about Moseley-Braun's dealings in Nigeria as "sticky wickets" that she should be allowed to address.
With the exception of a failed attempt with Burnett to revive ABC project The Runner, little surfaced during Braun's two-year tenure, which ended late last year.
An evidentiary hearing on Braun's appeal was held Jan. 19-20 in New York, ending the day before the player accepted the NL MVP award at a black-tie dinner.
WSJ: MLB: Ryan Braun's 50-Game Suspension Overturned - Milwaukee Brewers
"I followed the same procedure in collecting Mr. Braun's sample as I did in the hundreds of other samples, " Dino Laurenzi Jr. said in a statement released Tuesday.
"Today the arbitration panel announced its decision, by a 2-1 vote, to sustain Ryan Braun's grievance challenging his 50-game suspension by the commissioner's office, " a statement from the players' association said.
WSJ: MLB: Ryan Braun's 50-Game Suspension Overturned - Milwaukee Brewers
Arbitrator Shyam Das threw out Braun's ban on Thursday.
WSJ: Ryan Braun, Milwaukee Brewers Slugger, Says 'Truth Prevailed' - MLB
Moseley-Braun's term was marked by controversy, including trips to Nigeria to visit the late dictator Sani Abacha, campaign finance questions and a blowup in which she compared columnist George Will to a Ku Klux Klansman.
During the hearing, Braun's side challenged the chain of custody from the time the urine sample was collected by Comprehensive Drug Testing Inc. to when it was sent, nearly 48 hours later, to a World Anti-Doping Agency-certified laboratory in Montreal, two people familiar with the case said.
WSJ: MLB: Ryan Braun's 50-Game Suspension Overturned - Milwaukee Brewers
Laurenzi's statement comes after Braun publicly blasted Major League Baseball's drug testing system and an arbitration board tossed out a 50-game suspension imposed as the result of the drug test Braun took last year.
Justin Bieber's manager Scooter Braun has criticised the Grammys after the teen pop star failed to secure any nominations for next year's awards.
Braun said Caldwell's attorneys told him police tried to pressure Caldwell into turning against Blake.
Kemp, who just two seasons ago finished runner-up to Milwaukee's Ryan Braun in the NL MVP voting after hitting a career-high 39 home runs with 126 RBIs and a .324 average, is batting .251 this season with two homers and 17 RBIs in 51 games, and has struck out 60 times in 191 at-bats following offseason shoulder surgery.
In a video posted by a fan on YouTube, Bieber's manager Scooter Braun was seen on stage explaining why the show had come to a temporary halt.
Braun arrived at Milwaukee's facility at about 9:40 a.m. walking through the complex's front doors to avoid reporters and camera crews waiting in back at the clubhouse entrance.
WSJ: Ryan Braun, Milwaukee Brewers Slugger, Says 'Truth Prevailed' - MLB
In a video posted by a fan on YouTube, Bieber's manager Scooter Braun was seen on stage during the show giving the audience an explanation as to why the show had come to a temporary halt.
BBC: Justin Bieber treated by doctors after O2 Arena concert
Blake's attorney, Harland Braun, believes two stuntmen will be key witnesses against his client.
He interviewed all of the Apollo astronauts and was friends with Wernher von Braun, the architect of Nasa's moon programme.
Chicago's powerful Mayor Daley has thrown his support behind Mrs Moseley-Braun, thus helping to scare off challengers to her in the party's primary election.
Braun also added a message to Bieber's fans, writing: "Looks like we get to stay the underdog a little longer".
In August 1996, not long before President Clinton was to come to Chicago for that year's Democratic convention, Senator Moseley-Braun made a freelance trip to Nigeria to meet General Sani Abacha, the head of a military regime that had jailed the winner of an election and executed political opponents.
"We expect he'll be on a 4:01 flight if he's allowed to, " said Linda Osberg-Braun, a lawyer for the Miami relatives.
Braun, 28, led the Brewers to the team's first division title in three decades in 2011, with a .332 batting average, 33 home runs and 111 runs batted in.
When Vice-President Al Gore arrived for the convention at Chicago's Midway Airport, he was met by Senator Moseley-Braun, Mayor Richard Daley and Congressman Jesse Jackson Jr.
When Messrs Daley and Jackson climbed into a black limousine with the Gores, Mrs Moseley-Braun was directed away from the car by a member of Mr Gore's staff.
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