In 1949, Jensen, who batted and threw right-handed, left college after his junior year and signed with the
Oakland Oaks in the
Pacific Coast League. His contract – along with
Billy Martin's – was sold to the
New York Yankees in with the intention of him being a backup for future Hall of Fame centerfielder
Joe DiMaggio. But he played in only 108 games for the Yankees over three years, primarily in
left field. He appeared as a pinch runner for
Bobby Brown in the eighth inning of Game 3 of the
1950 World Series against the
Philadelphia Phillies, but was in the game only briefly before
Johnny Mize popped up to end the inning. Jensen did not stay in the game defensively, and the Yankees completed a sweep of the Phillies in Game 4.
Mickey Mantle appeared in 1951 as DiMaggio's heir-apparent, preempting Jensen and starting in right field. Jensen did not appear in the 1951 Series against the
New York Giants. In May 1952 Jensen was sent to the
Washington Senators in a six-player deal, and he made his first
All-Star team. He finished the season with a .286
batting average and 80 RBIs, leading the league with 17 assists and placing third in the AL with 18 steals, a total he duplicated in 1953. He was traded to the Red Sox in December 1953, and led the AL with 22 steals in , also finishing third in RBIs (117) and fourth in home runs (25). But despite his speed he also set a major league record by
grounding into double plays 32 times, breaking fellow Red Sox
Bobby Doerr's total of 31; the record would stand until Red Sock
Jim Rice grounded into 36 double plays in . No longer facing the pressure of becoming his team's principal star, Jensen again made the All-Star team in , leading the league with 116 RBIs and finishing tenth in the MVP vote. In Jensen batted a career-high .315 and led the AL with 11 triples, and in he had 103 RBIs and led the league in both assists (16) and double plays (4). The 31 year-old star had his best season in , earning the AL
MVP and beating out
Bob Turley,
Rocky Colavito and
Bob Cerv with a .286 batting average, a league-leading 122 RBIs, also placing second in the AL with 99
walks and fifth in home runs (35),
doubles (31),
total bases (293) and
on-base percentage (.396). In June of that same year, he set a Red Sox club record for most home runs in a single month (since tied by
David Ortiz) with 14, and in July made his final All-Star team. In he again led the league in RBIs (112) and won his only Gold Glove after leading the AL in double plays (4) for the second time; he also scored a career-best 101
runs and stole 20 bases, finishing third in the AL in steals for the fourth time among his seven Top 10 finishes. He came in tenth in the MVP balloting.
Retirement Smack in his productive prime at 32, Jensen announced his retirement from baseball in January 1960, primarily because of an intense fear of flying, but also the result of the long separations from his family. He stated, "I have only one life to live, and I'll be happier when I can spend it with my family. Being away from home with a baseball team for seven months a year doesn't represent the kind of life I want or the kind of life my wife and children want." Indeed, upon his trade to the Red Sox in 1953 he considered not reporting to the team in order to return to his family in California, but general manager
Joe Cronin increased his salary by $1,000 and he agreed to play. As teams had increasingly turned to air travel in the 1950s, he had unsuccessfully sought to combat his aversion to flying, aided considerably by Red Sox owner
Tom Yawkey, who arranged for therapy treatments. Once major-league baseball expanded to the
West Coast in 1958, and with further expansion and constant air travel foreseen, Jensen's difficulties became virtually insurmountable. Jensen made a comeback attempt with Boston in , but turned to
hypnotherapy when his panic attacks at airports became unbearable. Frustrated by a sub-par season (.263, 66 RBIs), he retired again for good. In an 11-season career, Jensen was a .279 hitter with 199 home runs and 929 RBIs in 1,438
games. He also scored 810 runs, had 1,463
hits, 259 doubles, 45 triples, 143 stolen bases, and 750 walks, for a .369 on-base percentage and .460 slugging percentage. He finished his career with a .977
fielding percentage playing at all three outfield positions. ==Television appearances==