Lou Proietti begins his third season as the head coach of the Saint Peter's baseball team in 2021-22. He was named the new manager of the Peacocks' baseball team in June 2019, becoming the program's second full-time head coach. 

During a condensed 2021, Proietti guided the Peacocks to the program's best MAAC output since the 2016 campaign. Along the way, the Peacocks used veteran pitching, stout defense, and clutch hitting at the plate to record the programs most ever shutout wins in league play. Proietti's second campaign produced three overall shutout wins against MAAC foes Niagara, Marist, and Monmouth, leading to Saint Peter's most ever MAAC clean sheet victories in a single season and the first time the program has shutout three separate MAAC opponents in the same year. Moreover, the three total clean sheet wins for Saint Peter’s was the most for the program in almost a decade, having last held three or more total opponents run-less during 2012, when that lineup produced four total shutout wins between MAAC and non-conference opponents combined. In the classroom, his student-athletes garnered seven MAAC All-Academic team selections.  
In Proietti's inaugural season, the new skipper created an out of conference schedule that would put the Peacocks on road trips to seven different states during non conference action. The team would eventually give Proietti his first win after an upset win over Rutgers. The win snapped a six-game skid to the in-state power, and was the first defeat over the team since 2013.It was also the program's first time being victorious against a Power Five Conference team. Unfortunately, the season was cut short due to the COVID-19 pandemic, ending the Peacocks chances for more success in 2019-20. Six student-athletes were named to the MAAC All-Academic team in June and 13 to the MAAC Academic Honor Roll in July.  
Before joining Peacock Nation, Proietti spent the past four seasons at Stonehill College in Easton, Massachusetts, serving as the Skyhawks Associate Head Coach. At the Division II program, Proietti served as the team's recruiting coordinator, hitting coach, and worked closely with both the infielders and outfielders.

Prior to Stonehill, Proietti was an assistant at MAAC hOURglass Rival Rider from 2012-15. During his tenure, he was the hitting coach and third base coach, helping lead the Broncs to a pair of regular season MAAC Championships, including a season that broke the school record for most wins in a regular season in 2013. In 2014, he helped Rider third baseman Nick Richter lead the country in stolen bases. Head coach Barry Davis also won the MAAC Coach of the Year award in both 2013 and 2015 with Proietti on the staff.
 
Before his time at Rider, Proietti spent the 2009-10 season at McMaster University in Hamilton, Ontario, then acted as hitting coach for the Oneonta Outlaws of the PGCBL (Perfect Game Collegiate Baseball League) from 2010-12, and from 2013-2016, he coached the Plymouth Pilgrims in the NECBL (New England Collegiate Baseball League) as hitting coach. He helped 1st round MLB draft pick, Brent Rooker from Mississippi State win the 2015 NECBL MVP award.
 
Proietti also spent time working as a teacher and baseball coach at Georgetown Prep School in North Bethesda, Maryland (2011-13) and he served as a hitting instructor at Pitcher's Edge in McLean, Virginia (2012).

The Hamilton, Ontario native graduated from the University of Massachusetts, Amherst in 2007 and received his master's degree from the university in 2009. Proietti also earned a master's in Organizational Leadership from Rider in 2015. At UMass Amherst, he played shortstop while leading the Minutemen in batting average and stolen bases in 2006. Prior to UMass, Proietti played the 2004 season at Saint Peter's before transferring to Potomac State College in Keyser, West Virginia for the 2005 season. He helped Potomac State advance to the Junior College World Series, where the team finished 5^th nationally.