The New York Giants selected Bercich in the fifteenth round (179th overall) of the 1959 NFL draft with a future draft pick, which allowed the team to draft him before his college eligibility was over. He was also drafted by the Los Angeles Chargers in the second round of the 1960 AFL draft. He was released on September 5, 1960.
Dallas Cowboys
On September 8, 1960, he was claimed off waivers by the Dallas Cowboys. He became the first starter (6 starts) at strong safety in franchise history, while splitting time with Gary Wisener (3 starts) and Fred Doelling (3 starts).[3] He finished with 46 tackles (19 solo), 2 interceptions and 11 passes defensed.
In 1961, he suffered a concussion during the seventh game against the New York Giants and did not play another contest in the season. The next year, he missed the pre-season with a knee injury and was released before the start of the 1962 season.[4]