Feif un — actually in the mid 1990’s a US Naval Commander, Lcdr. Michael Schwartz (not Jewish, despite the name!) was indicted on charges of passing classified information to Saudi Arabia. He confessed and cooperated with investigators just like Jonathan Pollard. His final punishment after the various deals (and some pressure from the Saudi government) — a dishonorable discharge from the Navy, resulting in the loss of his pension and benefits, etc. No jail time whatsoever.
Mohammad Rezo Alavi, an Iranian born naturalized US citizen who worked in the Palo Verde Nuclear Generating Station was convicted in 2008 of bringing classified software from the nuclear plant in which he worked to IRAN (!)was convicted to 15 months in prison. The judge stated that although his actions could potential cause harm to the US, there is no evidence that harm has already occurred, and therefore he could not be tried with treason.
Hassan Abu-Jihaad, a convert to Islam was convicted in 2008 of passing military secrets to an Al-Quaida connected terror group in England, and was sentenced to 10 years. (This in the middle of the US “war on terror”)
Check out the link on my previous post for numerous other such examples, including spies for enemy countries such as Cuba, the Soviet Union, North Korea, etc.