Adrian Peterson remains undecided upon his future with the Minnesota Vikings.

Peterson told ESPN on Thursday night he is "still uneasy" about the prospect of returning to the Vikings in 2015, saying the organization working with the NFL to put him on the commissioner's exempt list last September made him question how much support he had from the team for whom he has played his entire career. 

 

Peterson felt like that decision was an "ambush" by the Vikings.

"There were people (in the organization) that I trusted, who knew exactly what was said, that weren't heard from" in the decision-making process.

 

"They weren't able to do anything about it," Peterson said.