The Vikings were flagged for six penalties during the match, including one for pass interference that ruled out an interception on what proved to be the Ravens' game-winning drive.
Peterson was particularly unhappy with a first-quarter fumble given against Toby Gerhart, but insisted that his ill-feeling did not extend to the Ravens players.
"Some of the calls that were made, you just went, 'Wow. I can't believe that was called'. [Gerhart's fumble] is just one of them, one out of many [bad calls]," ESPN quotes Peterson as saying.
"I wish [the Ravens] the best of luck the rest of the season. The Baltimore Ravens don't make the calls. It's a tough one to swallow."