In addition to being the first three and four star Navy SEAL, Admiral Olson was the Bull Frog, the longest serving Navy SEAL still on duty. At four-star flag rank, Olson was the highest-ranking Navy SEAL to hold the Bull Frog title. He was succeeded by Commander Brian Sebenaler and Admiral William McRaven. Who had also succeeded him as Commander of the United States Special Operations Command. And himself retired in 2014.