Steve Sanfilippo attended Janesville Craig High School, where he was selected to first team all-state in Wisconsin as a shortstop. In his high school career he played in three WIAA state championship games and won it in 1998.

Collegiately, Sanfilippo started his college career at Central Michigan then transferred to the University of Wisconsin-Milwaukee. At Milwaukee he was selected to the Horizon League Newcomer Team as a shortstop his first year. That summer he played with the Madison Mallards in the Northwoods Collegiate League. Sanfilippo was a three-year letter winner on the baseball diamond for the Panthers (2003-2005).

Sanfilippo started his coaching experience at Ripken Baseball Academy in Aberdeen, MD. At Ripken Baseball, Sanfilippo gained baseball knowledge working beside Bill & Cal Ripken and many ex major leaguers. In 2005, Sanfilippo started coaching at DIII Milwaukee School of Engineering MSOE, and spent three years as the infield/ hitting coach.

After MSOE, he went back to UWM and served as an Assistant Coach from 2008-2010. Sanfilippo was part of the 2010 Horizon League Championship team which played in the Arizona State Regional. Sanfilippo just finished his fourth season as the Director of Baseball Operations for the Milwaukee baseball team. His duties include day to day operations, private baseball instruction, and fundraising.

Currently, Steve Sanfilippo has teamed up with Steve Becker at Athlete Performance to provide the North Shore area with top baseball and strength training throughout the year. He also helps instruct youth baseball and softball for the Whitefish Bay Jr. Dukes programs, and volunteers at Milwaukee

Sanfilippo is married to wife Leah, with a two children son Sam and daughter Lola.