McMullen won an everyday job batting second for Gil Hodges' Senators. Though he led the American League with 22 errors in, he soon earned a reputation as one of the slicker fielding third basemen in the AL. On August 13, 1965, he tied an AL record by starting four double plays against the Baltimore Orioles. On September 26,, he set an AL record with eleven assists from third against the Boston Red Sox. He led AL third basemen in total chances over three seasons from to, and led AL third basemen in double plays in 1967 and putouts in 1969. McMullen had his first career multi-home run game on July 16, 1967. Later in the same month, he embarked on a career-high 19-game hit streak, which saw him hit a game-winning home run to end a twenty inning marathon with the Minnesota Twins on August 9. He batted a career-high.272 while driving in a career-high 87 runs in 1969. In all, clubbed 86 home runs and drove in 327 during five plus seasons with the Senators. Shortly into the season, he was dealt to the California Angels for Rick Reichardt and Aurelio Rodríguez.
McMullen played the season opener at third base, but was soon displaced by rookie Ron Cey. From there, he served mostly as a pinch hitter, going six-for-nineteen with a walk, two home runs and nine RBIs in that role. He spent two more seasons backing up Cey and pinch hitting in Los Angeles, clubbing a pinch hit grand slam against the San Diego Padres on April 24,. He was released during Spring training, but soon afterwards caught on with the Oakland Athletics. He spent one season in Oakland, serving primarily as a designated hitter and pinch hitter. He spent his final season with the Milwaukee Brewers before retiring. He hit a pinch hit home run against the Seattle Mariners in his final career at bat.
Personal life
Prior to his 1973 season with the Dodgers, McMullen’s wife Bobbie was diagnosed with breast cancer. Three months pregnant at the time with the couple’s third child, she declined treatment that could have prematurely terminated her pregnancy. Her cancer treatment began after she gave birth to son Jonathan in November 1973. McMullen was able to continue with his baseball activities because of the insistence of his wife who died on April 6,. They have three children.
Career
Games
PA
AB
Runs
Hits
2B
3B
HR
RBI
SB
BB
SO
Avg.
Slg.
OBP
Fld%
1583
5729
5131
568
1273
172
26
156
606
20
510
518
.248
.383
.316
.965
Robbed of the opportunity to play in the 1963 World Series by an injury, McMullen returned to the post-season in the twilight of his career with the Los Angeles Dodgers. In the 1974 National League Championship Series, he struck out against the Pittsburgh Pirates' Bruce Kison in his only post-season at-bat. As of 2009, McMullen is a member of the Los Angeles Dodgers organization serving as a representative of the Dodgers Legend Bureau.