9:29 AM PT -- The fundraiser for Mary Lou Retton has now hit a quarter-million dollars ... with famous Texas businessman Jim "Mattress Mack" McIngvale's wife, Linda donating an astounding $50,000.
The financial support is pouring in for Olympics legend Mary Lou Retton ... with more than $181k in donations being collected as she battles a serious medical issue.
As we previously reported, the gold medalist has been in the ICU fighting for her life as she deals with a "very rare form of pneumonia," according to her daughter ... and she is currently unable to breathe on her own.
Considering 55-year-old MLR is uninsured, the family started a SpotFund page to help with medical bills ... and shortly after the fundraiser went live, it shattered its goal of $50,000.
In fact, the cause has raised more than triple the original goal as of Wednesday morning ... and it only continues to rise.