Former Minnesota punter Chris Kluwe says his special-teams coordinator made anti-gay comments while Kluwe was with the Vikings.
Kluwe wrote a scathing first-person account on an Internet website on Thursday. In it, he alleges that coach Mike Priefer made several anti-gay comments in objection to Kluwe's outspoken support of a gay marriage amendment in Minnesota.
Kluwe called Priefer "a bigot" and Spielman and Frazier "two cowards" for releasing him in May after eight seasons with the Vikings.
The Vikings issued a statement saying they take the allegations seriously. They also say he was released because of his football performance, not something else.
"The Minnesota Vikings were made aware of Chris Kluwe's allegations for the first time today. We take them very seriously and will thoroughly review this matter.
"As an organization, the Vikings consistently strive to create a supportive, respectful and accepting environment for all of our players, coaches and front office personnel. We do not tolerate discrimination at any level.
"The team has long respected our players' and associates' individual rights, and, as Chris specifically stated, Vikings ownership supports and promotes tolerance, including on the subject of marriage equality. Because he was identified with the Vikings, Chris was asked to be respectful while expressing his opinions. Team ownership and management also repeatedly emphasized to Chris that the Vikings would not impinge on his right to express his views.
"Any notion that Chris was released from our football team due to his stance on marriage equality is entirely inaccurate and inconsistent with team policy. Chris was released strictly based on his football performance.
"We will have further comment at the appropriate time."
In his article, Kluwe alleged that Priefer grew more and more impatient with the various causes Kluwe supported and several times made anti-gay remarks during team meetings.
Kluwe said he wanted to post his article now in hopes of discouraging the Vikings, or any other team, from employing Priefer, who is widely respected at Vikings headquarters and is viewed by some as a potential head coach one day. Priefer was hired by the Vikings in 2011. He served previously as the special-teams coach in Denver and Kansas City.
"If there's one thing I hope to achieve from sharing this story," Kluwe wrote, "it's to make sure that Mike Priefer never holds a coaching position again in the NFL, and ideally never coaches at any level."
Priefer responded to the allegations levied against him, via The Associated Press.
"I want to be clear that I do not tolerate discrimination of any type and am respectful of all individuals," Priefer said. "I personally have gay family members who I love and support just as I do any family member.
"The primary reason I entered coaching was to affect people in a positive way. As a coach, I have always created an accepting environment for my players, including Chris, and have looked to support them both on and off the field.
"The comments today have not only attacked my character and insulted my professionalism, but they have also impacted my family. While my career focus is to be a great professional football coach, my number one priority has always been to be a protective husband and father to my wife and children."
Kluwe averaged 44.4 yards per punt over his career in Minnesota, including a career-high 39.7 yard net average in 2012. But he ranked just 17th in the NFL in punting that season before he was cut and he lost a competition for the punting job with the Oakland Raiders in the preseason in 2013. He had several tryouts during the season, but was never signed.
Kluwe said he wanted to wait to air his grievances until after the season so as not to provide a distraction to his friends on the team during the season.
The Associated Press contributed to this report.