Vibert Ernesto "Webbo" Clarke (June 8, 1928 – June 14, 1970) was a Panamanian professional baseball player. Born in Colón, Clarke was a left-handed pitcher who made seven appearances for the 1955 Washington Senators of Major League Baseball. He stood 6 feet (1.8 m) tall and weighed 165 pounds (75 kg).

Before signing with Washington in 1955, Clarke pitched in the Negro Leagues, including service with the Cleveland Buckeyes and Memphis Red Sox. In his first season in the Senators' system, Clarke compiled a win–loss record of 16–12 in 33 games (32 as a starting pitcher), with an earned run average of 3.40 in 262 innings pitched for the Charlotte Hornets of the Class A Sally League. The performance earned him a promotion to the Senators' 40-man roster in September. Among his seven games with Washington, he made two starts: September 10 against the Kansas City Athletics and September 16 against the Baltimore Orioles. His debut start was the better of the two. He pitched seven innings and gave up four runs, all earned, and four hits, one of them a solo home run by the A's Gus Zernial. He held a 5–1 lead through seven innings, but walked the bases loaded in the eighth frame and was removed from the game. The Senators' relief pitchers, Chuck Stobbs and Pedro Ramos, then gave up the tying runs and ultimately lost the game, 8–6. Clarke's seventh and last MLB game, September 24 against the Orioles, was his finest: appearing in relief, he set down all nine Baltimore batters he faced over three innings.

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