U.S. District Judge David Doty on Thursday overturned NFL arbitrator Harold Henderson's denial of Adrian Peterson's appeal, clearing the way for the Minnesota Vikings running back's possible reinstatement to the league.

Doty issued his order Thursday, less than three weeks after hearing oral arguments. The ruling sends the case back for further proceedings consistent with the rules of the collective bargaining agreement.

"I was pleased to learn about Judge Doty's decision," Peterson said in a statement Friday released through his agency, Relativity Sports. "It is a positive step in protecting players' rights and preserving due process for all players. It also brings me one step closer to getting back on the football field and playing the sport I love. As I prepare for my return to football, I am still focused on my family and continue to work to become a better father every day."

Peterson expressed "gratitude for all of the support" from fans, the NFL Players Association, union lawyer Jeffrey Kessler and his agents. It didn't mention the Vikings at all, though.

The league had suspended Peterson through at least April 15 under its personal conduct policy for his role in a child abuse scandal that shook the league. Doty said in his 16-page ruling that Henderson "simply disregarded the law of the shop and in doing so failed to meet his duty" under the CBA.

NFL spokesman Brian McCarthy said in a statement that the league disagrees with Doty's decision and will appeal.

"We believe strongly that Judge Doty's order is incorrect and fundamentally at odds with well-established legal precedent governing the district court's role in reviewing arbitration decisions," McCarthy said. "As a result, we have filed a notice of appeal to have the ruling reviewed by the Eighth Circuit Court of Appeals."

McCarthy said that Peterson would be placed back on commissioner Roger Goodell's exempt list rather than being immediately reinstated, "pending further proceedings by appeals officer Harold Henderson or a determination by the Eighth Circuit Court."

McCarthy added, "The commissioner's exempt list permits a player and team to communicate." McCarthy also said players on the exempt list can be traded, released or have contracts restructured after the start of the league year on March 10.

The Vikings released a statement saying they would welcome Peterson back to the team once his situation is resolved.

"Adrian Peterson is an important member of the Minnesota Vikings, and our focus remains on welcoming him back when he is able to rejoin our organization," the statement read. "Today's ruling leaves Adrian's status under the control of the NFL, the NFLPA and the legal system, and we will have no further comment at this time."

NFL Players Association executive director DeMaurice Smith said in a statement that Doty's decision was a "victory for the rule of law, due process and fairness."

Vikings running back Adrian Peterson is eligible to be reinstated after Judge David Doty ruled in favor of the NFLPA and overturned the NFL's suspension. Jeff Curry/USA TODAY Sports

The crux of the issue was the application of the enhanced personal conduct policy, increasing a suspension for players involved with domestic violence from two games to six games. Because that was implemented after the injuries occurred to Peterson's son, delivered by a wooden switch that Peterson was using for discipline, the union contended that the prior standard of punishment should apply.

"Our collective bargaining agreement has rules for implementation of the personal conduct policy and when those rules are violated, our union always stands up to protect our players' rights," Smith said. "This is yet another example why neutral arbitration is good for our players, good for the owners and good for our game."

Doty's courtroom has long been a ground zero of sorts for NFL labor matters, and his ruling pattern has favored the union more often than not.

The increased penalty for domestic violence arose from the furor over the league's handling of former Baltimore Ravens running back Ray Rice, who was seen on surveillance video knocking out the woman who's now his wife with a punch in an elevator.

Rice was initially suspended for two games before Goodell declared the ban indefinite. The arbitrator who heard Rice's appeal, former U.S. District Judge Barbara Jones, ruled that Goodell's decision was "arbitrary" and an "abuse of discretion."

Despite the NFL's argument that the ruling by Jones was irrelevant to Henderson's, Doty disagreed.

"The court finds no valid basis to distinguish this case from the Rice matter," Doty said.