a mark that still stands today as a Pilots/Brewers record. He also showed his versatility in the field, making over 50 starts at both second and third base, 21 starts in center field, and also seeing playing time at both corner outfield positions. When the Pilots moved to Milwaukee and changed names the following season, Harper was also the first player to come to bat in Milwaukee Brewers history. On April 7, 1970, he led off the bottom of the 1st against California Angels right-hander Andy Messersmith. He hit a ground ball to third baseman Aurelio Rodríguez, who threw to first baseman Jim Spencer for the out. The 1970 season was probably the best statistically in Harper's career. He recorded career highs in hits, doubles, home runs, and RBIs on his way to the lone All-Star game appearance of his career. He also became the first Brewer, and just the fifth major leaguer at that point, to join the 30–30 club by hitting 31 home runs and stealing 38 bases and came in 6th in the AL MVP voting. A second Brewer did not join him in the 30–30 club until Ryan Braun accomplished the feat in 2011. Boston Red Sox Harper was part of a ten-player blockbuster that sent him, Marty Pattin, Lew Krausse and minor-league outfielder Pat Skrable to the Boston Red Sox for George Scott, Jim Lonborg, Ken Brett, Billy Conigliaro, Joe Lahoud and Don Pavletich on October 10, 1971. Harper became the Sox' starting center fielder and leadoff hitter from 1972–74, playing well enough to earn him votes in the AL MVP balloting in '72 and '73. 1973 was his best season with the club, as he led the league in stolen bases for the second time in his career, setting an all-time Red Sox mark with 54, until Jacoby Ellsbury broke the record on August 25, 2009. He hit 17 home runs and stole 28 bases primarily as a designated hitter in 1974. His trade to the California Angels for Bob Heise at the Winter Meetings on December 2, 1974 was driven by the Red Sox using its outfielder surplus to address its lack of infielder depth. California Angels Harper played only part of the 1975 season for California. The Angels, well on their way to a last-place division finish, sold him for cash to the contending Oakland A's. Oakland A's Revitalized by the trade