Paul Mainieri will announce his retirement on Friday, The Advocate reported. 
The head coach of LSU baseball for 15 seasons, Mainieri led the Tigers to a national championship in 2009, five college word series births, six Southeastern Conference tournament championships and four SEC regular season crowns. 
The 2021 was a disappointing campaign for LSU. The Tigers were bounced from the SEC tournament after one game on Tuesday, and they finished the regular season 34-22, including a 13-18 record in the SEC. 
This story will be updated as more information becomes available.