Education
Mazzoni graduated from Seneca Valley High School in Harmony, Pennsylvania.
Mazzoni graduated from Seneca Valley High School in Harmony, Pennsylvania.
He was drafted out of high school by the Washington Nationals in the 26th round of the 2008 MLB June Amateur Draft but decided not to sign and instead enrolled at North Carolina State University (North Carolina State), where he played college baseball for the North Carolina State Wolfpack baseball team The New York Mets of Major League Baseball (MLB) selected Mazzoni in the second round of the 2011 MLB draft. He made his professional debut with the Brooklyn Cyclones of the Class A-Short Season New York–Penn League in 2011, and pitched for the Saint Lucie Mets of the Class A-Advanced Florida State League in 2012.
Pitching for the Binghamton Mets of the Class Associate of Arts Eastern League in 2013, Mazzoni had a 4.36 earned run average and 74 strikeouts in 66 innings pitched.
His 2013 season ended prematurely when he required surgery to repair a torn meniscus in his knee. The Mets invited Mazzoni to spring training in 2014.
On March 18, they assigned him to minor league camp. He played for the Las Vegas 51s of the Class American Automobile Association Pacific Coast League (PCL) that year.
After the 2014 season, the Mets added Mazzoni to their 40-man roster to protect him from being eligible in the Rule 5 draft.
On March 30, 2015, the Mets traded Mazzoni and a player to be named later to the San Diego Padres for Alex Torres. He began the season with the El Paso Chihuahuas of the PCL, and was promoted to the major leagues on April 26. He made his MLB debut as a relief pitcher the next day.