Frank Gerald DaVanon (born August 21, 1945) is a former professional baseball player. He played all or part of seven seasons in Major League Baseball, primarily as an infielder.

DaVanon was drafted by the St. Louis Cardinals in the 1st round of the secondary phase of the 1966 MLB amateur draft. He was then selected with the 24th pick in the 1968 Major League Baseball expansion draft by the San Diego Padres, and was a member of their first Opening Day roster in 1969.

DaVanon made his major league debut for the Padres on April 11 as a pinch hitter. Then, just six games into the season, the Padres sent their starting shortstop, Rafael Robles, to the minor leagues, and tabbed DaVanon as his replacement. His tenure as Robles' replacement didn't last much longer, as he was benched in mid-May after hitting just .145 in 23 games. After playing just one more game, he was traded back to the Cardinals for Sonny Ruberto and John Sipin.

Back with the team that drafted him, DaVanon returned to the minor leagues. He spent most of the rest of 1969 as well as most of 1970 with the Tulsa Oilers, playing in 27 major league games during that time. After the 1970 season, he was traded to the Baltimore Orioles for veteran pitcher Moe Drabowsky.

DaVanon spent the entire 1971 season with the major league Orioles, serving as a reserve infielder, mainly backing up second baseman Davey Johnson and shortstop Mark Belanger. In his first full season in the majors, he batted .235 in 38 games. However, he was sent back to the minor leagues to start the 1972 season, and in midseason he was traded to the California Angels for Roger Repoz, a veteran outfielder who was also in the minors at the time.

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