Under Armour says the Ravens have learned "hard lessons" from the Ray Rice domestic abuse case, and that it is sticking with its beleaguered corporate partner.
Another Ravens sponsor, Verizon Wireless, also says it will continue to partner with the franchise.
The two are among the highest-profile Ravens' sponsors.
In 2012, the Ravens expanded their relationship with Under Armour, signing a 10-year agreement to name the team's practice facility for the Baltimore-based sports apparel and footwear company and agreeing to collaborate on a series of community and youth projects.
Under Armour's logo was visible behind Ravens' owner Steve Bisciotti on Monday as he addressed the club's handling of the Rice case during a news conference. Bisciotti delivered a rebuttal of a recent ESPN report saying Ravens executives were aware of the severity of Rice's altercation with then-fiancee Janay Palmer but conducted a months-long campaign for leniency from the judicial system and from the league.
"Under Armour believes domestic violence, in any form, against anyone, is unacceptable," the company said afterward. "The Ravens have acknowledged that they have made a mistake in their initial handling of this situation. They have learned hard lessons and vowed to implement a policy to ensure it doesn't happen again. We value our relationship with the Ravens and they have been a tremendous partner in a shared initiative to strengthen the Baltimore community. We believe they will work through this and find ways to have a positive societal impact in efforts to stem domestic violence."
Verizon Wireless, which is among about 100 team sponsors, reiterated its support Tuesday, referring a reporter to a Sept. 18 statement.
In the statement, posted on the LinkedIn social media site, Verizon CEO Lowell McAdam said: "Because of our long-standing commitment to this issue, we believe we can be far more effective in preventing domestic violence by remaining in the arena with our partners at the NFL, rather than backing away from the controversy."
Another sponsor, Southwest Airlines, said Monday that it found allegations of misconduct by NFL players "disturbing," and that it was ready to "take prompt action," depending on the course of events. But its sponsorship or advertising schedule with the team has not changed, and it said it was hopeful the NFL would enact "real change."