At 6'2", 24-year-old Greenspan is a towering, young presence in the Loons' back line. Selected 26th overall in the 2015 MLS SuperDraft by Colorado Rapids, he arrived to MNUFC via a trade with his former club.
An active member of the U.S. Navy, Greenspan did not join the Rapids immediately following the 2015 MLS SuperDraft. Colorado instead waited until June 5 to officially sign him, as he was granted permission to train and play for the club around the fulfillment of his Naval duties.
Greenspan made his first professional appearance in a 4-1 win over the Colorado Springs Switchbacks in U.S. Open Cup play. His first official MLS appearance came eight days later. After four games with Colorado in 2015, Greenspan began the 2016 season in San Diego aboard a U.S. Navy destroyer, rejoining Colorado in July upon being given assignment in Denver. Shortly after his move to Denver, he was sent on loan to the Switchbacks and then to the Charlotte Independence, playing 11 total matches in 2016.
The center back was loaned out to USL's Pittsburgh Riverhounds toward the start of the 2017 season (April 10 until the end of May), where he played every minute of eight matches, making the team of the Week twice and leading his side to four clean sheets. He made his debut for MNUFC in MLS play in a 1-0 loss to Columbus Crew SC.
2017: Loaned to Pittsburgh Riverhounds on April 10 ... Returned to MNUFC on May 25 ... Made first start for MNUFC on June 14 vs SKC in U.S. Open Cup. Subbed off due to injury in the second half ... Made first MLS start for MNUFC on July 4 vs CLB ... Subbed off due to injury on July 19 vs HOU ... Ejected from October 7 match vs SKC and suspended for match on October 15 vs LA
COLLEGE: Greenspan is one of the most decorated players in the history of Navy men's soccer, earning All-American honors as both a junior and senior and leading The Mids to the school's first NCAA tournament win in 42 years in 2013. In May 2015, he was awarded the NAAA Sword for Men, which is presented to the man of the graduating class who is considered by the Association's Athletic Council to have personally excelled in men's athletics during his years of varsity competition.