Alvin David Luplow, Jr. (born March 13, 1939) is an American former professional baseball player who played outfielder in the Major Leagues from 1961 to 1967 for the Cleveland Indians, New York Mets, and Pittsburgh Pirates.
Luplow attended Michigan State University, where he played varsity football, before signing his first pro contract with Cleveland. He batted left-handed, threw right-handed, stood 5 feet 10 inches (1.78 m) tall and weighed 175 pounds (79 kg).
Appearing in 481 games over all or parts of seven Major League seasons, Luplow collected 292 hits in 1,243 at bats. Usually serving in a reserve role, Luplow was the regular right fielder for the 1964 Indians and the 1966 Mets.
He is, however, remembered for making one of the most spectacular catches in the history of Fenway Park on June 27, 1963, off the bat of Red Sox hitter Dick Williams. With the tying runs on base, in the eighth inning, Luplow raced back to the right field bullpen wall, leapt, and made a backhanded catch as he flew over the fence and head-first into the bullpen.