“You are wrong, Jesse was a UDT(Frogman), he never completed the extra 26 weeks of training that Frogmen had to endure before becoming a Navy Seal. The Navy Seals were not a unit until the mid 80s, Jesse left the Navy in the mid 70s.”
JFK established Seal Team 1 and Seal Team 2 in 1962.
From NavySeals.com “In 1962, President Kennedy established SEAL Teams ONE and TWO from the existing UDT Teams to develop a Navy Unconventional Warfare capability. The Navy SEAL Teams were designed as the maritime counterpart to the Army Special Forces Green Berets. They deployed immediately to Vietnam to operate in the deltas and thousands of rivers and canals in Vietnam, and effectively disrupted the enemys maritime lines of communication.”
Regardless, Ventura was not a SEAL.