In 1963, the Los Angeles Angels became the first team to use a golf cart as their bullpen car. The New York Mets introduced a bullpen car based on a golf cart with an oversized team hat in 1967.[4] The New York Yankees began using a Datsun 1200 painted with pinstripes in 1972. Rats chewed through the Datsun's cables,[5] and the team switched to a Toyota Celica in 1982.[2][4] The White Sox introduced a bullpen car built off of a Chrysler LeBaron in 1981,[4] but it was also unpopular with pitchers, who refused to ride in it, and fans, who threw garbage at it.[2]
The Seattle Mariners began using a version designed to look like a tugboat in 1982,[6] called the M.S. Relief. On Opening Day of the 1982 season, the Mariners' Bill Caudill hid the keys to the bullpen car, causing a delay in the start of the game.[7] Caudill organized a boycott of the tugboat, saying that it "should be fined as an embarrassment to the team".[8] No Mariners player ever rode in the tugboat, and it was removed from use less than a week later.[2][9]
Pitchers disliked the bullpen cars, leading to them being phased out. The last MLB team to use a bullpen car prior to its reintroduction in 2018 was Milwaukee, which phased out their motorcycle (which was also produced by Harley-Davidson) in 1995.[1]
The bullpen car remained in use in Japanese baseball. Most of them are convertibles so that fans can see the players inside, including many one-offs provided to the teams by the manufacturer. In the 1980s, the Yokohama DeNA BayStars of Nippon Professional Baseball introduced a bullpen car, a one-off Datsun Bluebird (910) convertible.[10] It was the first of a few bullpen cars provided by Nissan to their hometown team. It would be followed by a Be-1 and S-Cargo in the 90s.[11] In 2017, the BayStars began using the Nissan Leaf, while Yasuaki Yamasaki used a Toyota MR-S to enter games.[12][13] The Tokyo Yakult Swallows also use a custom Nissan, a one-off Y34 Cedric roadster.[14] The Hanshin Tigers currently use a modified smart fortwo convertible.[15]