Photographer Betsy Bissen claimed that Sano grabbed her wrist and tried to pull her inside a mall bathroom after an autograph session.
"I don't even want to think of what he may have done, had he got me thru (sic) that door", she wrote.
"Every time I have to hear about how great people think Miguel Sano is, I'm reminded of how bad he actually is and how he hurt me", she concludes.
In response to a Twitter user speculating the alleged assault was the reason the Twins might have been shopping Sano for a trade, Bissen tweeted the team didn't know anything about the alleged assault.
"I pulled back as he held onto my wrist", Bissen said.
"The next day, my body was sore all over from having to fight off this athlete that thought he was entitled to take advantage of me against my will", she said. Despite cries let out during the 10-minute struggle, no one helped her.
"The first base coach didn't bother me until he tried to ask for my phone number", she says.
"No he didn't rape me, but he sure did assault me", she wrote. He should have respected that and stopped.
Bissen also received a supportive tweet from former Twins player and current Tampa Bay Rays infielder Trevor Plouffe, who was with Minnesota in 2015.
It's your run of the mill statement, but at the very least the Twins acknowledge that they're taking the allegations seriously. The team added it wouldn't comment further "until more information is gathered".
In a statement to ESPN, MLB spokesman Mike Teevan confirmed the league is looking into Bissen's allegations. Passan added: "All 30 teams, and everyone at the league office, figured this moment was coming, that the reckoning redefining the treatment of women across America would sweep its way through a sporting culture filled with immature millionaires whose overgrown senses of entitlement are surpassed only by their capacity to make bad decisions". "I have the utmost respect for women, especially those working in professional sports, and I deeply sympathize with anyone who has experienced sexual harassment".