[2] Grekin led the Explorers to the 1952 National Invitation Tournament championship and was named co-Most Valuable Player with his teammate, Tom Gola.

[4] In 1953, Grekin received honorable mention in All-American voting from Newspaper Enterprise Association and United Press International.

[10] He played in his only game for the Warriors on October 31, where he recorded one personal foul,[1] before being waived in early November.

According to Warriors coach Eddie Gottlieb, Grekin did not fit as a playmaker playing at guard.

[11] Following his brief NBA stint, he played two seasons in the Eastern Professional Basketball League for the Pottsville Bolognas and the Sunbury Mercuries.