Giaquinto graduated from UConn in 1979, where he still holds the school's all-time single-game rushing record of 277 yards against Holy Cross in 1976. Before coaching college baseball, he had an accomplished playing career in football that included four seasons in the NFL. He first played for the Miami Dolphins in 1980 before joining the Washington Redskins, playing for the Super Bowl XVII squad that beat his former team for the title. After his professional football career, Giaquinto took a position as assistant baseball coach at George Mason University. There he received his master's in Education before being hired at SHU in 1988.
He and his wife Barbara have two children, Annie and Patrick.
- Led SHU to seventh consecutive Northeast Conference Championship Game in 2015, where the Pioneers won their fourth Championship in program history and third in five years.
- Twice he has led Sacred Heart to a program record 34 wins, in 2011 and 2013.
- Guided SHU to the NEC Tournament in 2005 for the first time in school history, and backed that up with another appearance in 2006, where they would go on to win the program's first ever NEC championship.
- During his tenure, eight Pioneers have been drafted into the MLB.
- Has coached two All-Americans, 46 All-NEC selections, three Conference Players of the Year, two Conference Rookies of the Year, one Northeast Region Pitcher of the Year, one Northeast Region Player of the Year, and one NEC Pitcher of the Year.
- He was honored as the Northeast Region and New England Collegiate Conference Coach of the Year in 1992, as well as the NEC Coach of the Year in 2005.
- He helped the Pioneers make the step up to Division I when they joined the Northeast Conference in 2000.
- He guided the Pioneers to the NCAA Regional Tournament three times at the Division II level - finishing eighth in the country at College World Series in 1992.
- Won back-to-back ECAC championships in 1990 and 1991 under his tutelage.