Daniel Ryan "Dan" Johnson (born August 10, 1979) is an American professional baseball first baseman for the Bravos de León of the Mexican Baseball League.
 He has played most of his ten seasons in Major League Baseball and Nippon Professional Baseball as a first baseman and pitcher, but has never held a Major League starting job for an entire season.
 He is perhaps best known for hitting a dramatic two-out, two-strike home run for the Tampa Bay Rays in the bottom of the ninth inning of the last game of the 2011 season, also known as Wild Card Wednesday.
 That home run tied the game, which the Rays eventually won, sending them to the playoffs.
 His clutch hitting for the Rays, along with his red hair and beard, earned him the nickname "The Great Pumpkin".
David Adam LaRoche (born November 6, 1979) is a former American professional baseball first baseman who played 12 seasons in Major League Baseball (MLB).
 He played for the Atlanta Braves, Pittsburgh Pirates, Boston Red Sox, Arizona Diamondbacks, Washington Nationals and Chicago White Sox.
 He is the son of pitcher Dave LaRoche and the brother of third baseman Andy LaRoche.
Enos Milton Cabell (pronounced "ca-BELL"), (born October 8, 1949) is an American former professional baseball first baseman and third baseman.
 He played fifteen seasons in Major League Baseball (MLB) from 1972 to 1986 for the Baltimore Orioles, Houston Astros, San Francisco Giants, Detroit Tigers, and Los Angeles Dodgers.
The Pittsburgh drug trials of 1985 were the catalyst for a Major League Baseball-related cocaine scandal.
 Several current and former members of the Pittsburgh Pirates – Dale Berra, Lee Lacy, Lee Mazzilli, John Milner, Dave Parker, and Rod Scurry – and other notable major league players – Willie Aikens, Vida Blue, Enos Cabell, Keith Hernandez, Jeffrey Leonard, Tim Raines, and Lonnie Smith – were called before a Pittsburgh grand jury.
 Their testimony led to the drug trials, which made national headlines in September 1985.
William Casey Blake (born August 23, 1973) is an American former professional baseball third baseman.
 He played in Major League Baseball (MLB) for the Toronto Blue Jays, Minnesota Twins, Baltimore Orioles, Cleveland Indians, and Los Angeles Dodgers.
 He had alternated between playing at third base and first base before becoming a full-time third baseman with the Indians.
 In , Blake moved to right field to accommodate the Indians' signing of third baseman Aaron Boone, and stayed there for two seasons before moving back to third base.
Michael Steven Hessman (born March 5, 1978) is an American former professional baseball first baseman and third baseman.
 He played in Major League Baseball (MLB) for the Atlanta Braves, Detroit Tigers and New York Mets and in Nippon Professional Baseball (NPB) for the Orix Buffaloes.
 He is currently the hitting coach for the West Michigan Whitecaps.
Kevin Edmund Youkilis ( ; born March 15, 1979), also known as "Youk" , is an American former professional baseball first baseman and third baseman, who primarily played for the Boston Red Sox.
 A native of Cincinnati, Ohio, he was drafted by the Red Sox in 2001, after playing college baseball at the University of Cincinnati.
 He played in Major League Baseball (MLB) for the Red Sox, the Chicago White Sox, and the New York Yankees.
 He is currently a special assistant to the Chicago Cubs and former Red Sox GM Theo Epstein.
Vernon Christopher Carter (born December 18, 1986) is an American professional baseball first baseman and designated hitter who currently plays for the Oakland Athletics organization.
 He previously played in Major League Baseball (MLB) for the Athletics, Houston Astros, Milwaukee Brewers, and New York Yankees.
 In 2016, while playing for the Brewers, Carter led the National League in home runs, along with Colorado Rockies third baseman Nolan Arenado, with 41.
Martin Joseph Kavanagh (June 13, 1891 – July 28, 1960) was an American baseball player.
 He played professional baseball for six years from 1913 to 1918, including five seasons in Major League Baseball with the Detroit Tigers (1914–1916, 1918), Cleveland Indians (1916–1917), and St. Louis Cardinals (1918).
 He appeared in 370 major league games, 172 as a second baseman, 73 as a first baseman, 23 as an outfielder, three as a third baseman, and two as a shortstop.
 During his major league career, he compiled a .249 batting average and a .330 on-base percentage.
Frederick Stanley McGriff (born October 31, 1963) is an American former professional baseball first baseman, who played for six Major League Baseball (MLB) teams from 1986 through 2004.
 A power-hitting first baseman, he became a five-time All-Star and led both leagues in home runs in separate years – the American League in 1989 and the National League in 1992.
 McGriff finished his career with 493 home runs, tied with Hall of Fame player Lou Gehrig, and only seven homers away from joining the 500 home run club.
 He won a World Series title as a first baseman with the Atlanta Braves in 1995.
 He currently works in the Atlanta Braves' front office as Special Assistant to Baseball Operations.

Question: How many seasons did a former professional baseball first baseman and third baseman play from 1972 to 1986, who was involved in he catalyst for a Major League Baseball-related cocaine scandal?
Answer: fifteen seasons