Sang Ho Baek -- a freshman on George Mason's 2021 baseball team -- died Saturday after his Tommy John surgery turned tragic ... his teammate, Scott Morgan, has confirmed.
The pitcher recently underwent the elbow procedure ... and in a statement on a GoFundMe page, Morgan announced Baek ultimately passed away due to complications from it.
He was just 20 years old.
"After battling through injuries throughout the season, Sang required Tommy John surgery," Morgan, a GMU outfielder, wrote in the GoFundMe statement.