| Lou Proietti | |
| Birth Date: | 27 May 1983 |
| Birth Place: | Hamilton, Ontario |
| Player Years1: | 2004 |
| Player Team1: | Saint Peter's |
| Player Years2: | 2005 |
| Player Team2: | Potomac State College |
| Player Years3: | 2006–2007 |
| Player Team3: | UMass |
| Player Positions: | Shortstop |
| Coach Years1: | 2008–2009 |
| Coach Team1: | Cardinal Newman |
| Coach Years2: | 2010 |
| Coach Team2: | McMaster University (asst) |
| Coach Years3: | 2013–2015 |
| Coach Team3: | Rider (asst) |
| Coach Years4: | 2016–2019 |
| Coach Team4: | Stonehill (H/IF/RC) |
| Coach Years5: | 2020–2022 |
| Coach Team5: | Saint Peter's |
| Overall Record: | 14–79 |
| Tournament Record: | NCAA: 0–0 |
Louis Anthony Proietti (born May 27, 1983) is an American baseball coach and former shortstop. Proietti played college baseball at Saint Peter's in 2004, Potomac State College of West Virginia University in 2005 and at University of Massachusetts Amherst from 2006 to 2007 for coach Mike Stone. He then served as the head coach of the Saint Peter's Peacocks (2020–2022).
Proietti was born in Hamilton, Ontario. He attended Berkshire Preparatory School in Sheffield, Massachusetts. After graduation from high school, he decided to attend Saint Peter's University to play baseball. After his freshman year, he left Saint Peter's to play junior college baseball for Potomac State College in West Virginia. After his sophomore year, he committed to play for UMass. He concluded his career after the 2007 season.
In 2019, Proietti was named the head coach of the Saint Peter's Peacocks baseball program.[1] Proietti stepped away from the Peacocks following the 2022 season.