Marshall was signed by the Philadelphia Phillies as an amateur free agent in 1960. He didn't pitch professionally until 1965 in the minor leagues. Marshall was purchased by the Detroit Tigers in 1966. He made his Major League debut with the Tigers on May 31, 1967, pitching one inning against the Cleveland Indians. He pitched in 37 games for the Tigers that season, all in relief, recorded 10 saves and had a 1.98 earned-run average. But the Tigers sent him back to the minors for 1968, and he was drafted by the Seattle Pilots with the 53rd pick in the 1968 expansion draft. The Pilots used him mainly as a starter in his only season there, as he went 3-10 with a 5.14 ERA. He was purchased by the Houston Astros after the season and then traded to the Montreal Expos on June 23, 1970. He began to flourish with Montreal, eventually leading the National League in both saves and games pitched in 1973. He was traded after the 1973 season to the Los Angeles Dodgers for Willie Davis. Marshall won the National LeagueCy Young Award in as a member of the Dodgers as well as being named the NL Pitcher of the Year by The Sporting News. He set a Major League record for most appearances by a relief pitcher in 1974, appearing in 106 games. He was a member of the National League All Star Team in 1974 and. Marshall was also named Fireman of the Year by TSN with three different teams: in the NL in 1973 with the Montreal Expos and 1974 with the Los Angeles Dodgers, and a third time in 1979 in the American League with the Minnesota Twins. He was voted the Montreal Expos Player of the Year in 1972 and 1973 and was also an original member of the Seattle Pilots. Marshall, who relied primarily on an elusive screwball, led his league in games pitched four times, saves three times, and games finished five times. He is the holder of two major league records, both of which he set in the 1974 season: most appearances in a season, and most consecutive team games with a relief appearance. He also holds the American League record for games pitched in a season with 90 for Minnesota in 1979. In his record-setting 1974 season, he pitched 208.1 innings, all of which came in relief appearances. He attended Michigan State University, earning three degrees, including a Ph.D. in kinesiology. In the months preceding his 1974 Cy Young season, Marshall considered retiring in order to work on his Ph.D. Marshall eventually would pitch for the Dodgers that year alongside teammate Tommy John. When John went down to injury, it was Marshall who suggested John attempt a radical surgery that would eventually bear John's name.
Career statistics
W
L
PCT
ERA
G
GS
CG
SHO
SV
IP
H
ER
R
HR
BB
SO
WP
HBP
97
112
.464
3.14
724
24
3
1
188
1386.2
1281
548
484
79
514
880
72
31
Personal
Marshall earned his PhD in exercise physiology from Michigan State University in 1978. Marshall teaches and advocates a pitching method he developed that he "believes could completely eradicate pitching-arm injuries." He wants pitchers to have a smooth transition. To pitch, the arm has to externally rotate before the ball accelerates. With traditional pitchers, the thrower often lifts his elbow before his hand ; this leads to the ball coming up late and the arm to externally rotate late. The elbow will be accelerated forward while the hand still goes backward, which creates enormous stress on the arm. Marshall instead wants pitchers to externally rotate early as they swing their arm up. That means the pitcher will lift the hand before the elbow, so that the wrist faces away from the body and up, the hand is above the elbow when the front foot touches the ground, which leads to a smooth transition without a "forearm bounce", as Marshall calls it. He wants to first lay back the forearm and then accelerate by rotating the body instead of bending over, in order to protect the elbow against injury. In September 1982, nearly a year after his final major-league game, Marshall was arrested on charges of disorderly conduct and fourth-degree assault stemming from an incident that had occurred outside Marshall's home in Minnetonka, Minnesota. A community dogcatcher alleged that Marshall had used her truck for target practice after she met with him at his house to discuss a black Labrador dog who she believed was his. The dog catcher, Mary Jo Strand, alleged that Marshall had gone into his garage after the discussion, retrieved a baseball and heaved it at her departing vehicle. The ball allegedly struck the top of Strand's truck, landing about two feet from the driver's window. Marshall denied threatening Strand or throwing the ball at her. He also denied that the dog was his. Instead, he asserted that he twice had asked Strand to leave his property and that if she did not do so, he would consider her to be trespassing and would not be responsible "if something happens to your truck", he told the Associated Press.
