Bud Zipfel was a slugging first baseman who was very young when the Senators brought him up for parts of the 1961 and 1962 seasons. His Baseball-Reference page lists a few transactions for Zipfel, but ends after 1960.
Zipfel's career goes from the Senators in 1962 to San Diego of the PCL in 1963, a Reds affiliate. We find out how from the Daily Times of Dec. 18, 1962:
“The Washington Senators sold Marion (Bud) Zipfel, 24-year-old first baseman, to San Diego of the Pacific Coast League yesterday.”
Zipfel went to training camp with the Reds in 1963, but never made it back to the majors.
Bob Dillinger was a very good third baseman in the late forties who put up batting averages of .321 and .324 in the 1948 and 1949 seasons for the Browns. In 1951 he was sold by the Pirates to the White Sox, and Dillinger hit .301 for Chicago the rest of the way. After that season, Baseball-Reference has him going to independent Sacramento of the PCL to finish his career, but doesn't give the how. I found how in the Toledo Blade of March 25, 1952:
“Third baseman Bob Dillinger, who carried a $125,000 price tag two years ago, has been sold by the Chicago White Sox to the Sacramento Solons for $10,000 and a player yet to be named.”
By the way, Dillinger finished his major league career with a .306 batting average, and naild PCL pitching for a .366 average over 170+ games in 1953!
Zipfel from eBay
Dillinger from Wikipedia