Minor leagues Heilmann appeared in a semipro baseball game in 1913 for a team from
Hanford, California. While playing for Hanford, he was signed by a scout for the
Portland Beavers of the
Pacific Coast League (PCL). After being signed by the Beavers, Heilmann was assigned to the
Portland Colts of the
Northwestern League. He compiled a .305
batting average in 122 games for the Colts.
Detroit Tigers 1914 to 1920 seasons In September 1913, Heilmann was drafted by the
Detroit Tigers. He made his major league debut with the Tigers on May 16, 1914, and played in 68 games that year, batting .225 and committing six errors in 31 games in the outfield (29 games in center field) for an .870
fielding percentage. Before the health problems sidelined him, Heilmann appeared in 98 games for the Seals and compiled a .364 batting average and .544 slugging percentage with 23 doubles and 12 home runs. Heilmann returned to the Tigers in 1916 and appeared in 136 games, including 30 games at first base and 77 as an outfielder. Although his .282 batting average was low by the standards he would set later, he ranked among the
American League leaders with 30 doubles (seventh best), 77 RBIs (sixth best) and 43 extra base hits (eighth). His heroic act was reported in the national press, and he was loudly applauded at the next day's game. He continued to improve at the plate in 1917, once again ranking among the American League leaders with 85 RBIs (fourth), five
home runs (seventh) and 11 triples (eighth); but he was called "Slug" due to his notoriously slow running and difficulties in the field. He served as a quartermaster on submarines off the
West Coast of the United States. They had a daughter, Mary Ellen, and a son, Harry Jr., and lived in Detroit.
1921 season In 1921, Heilmann appeared in 149 games, including 145 as the Tigers' starting right fielder. He won his first batting title, compiling a .394 batting average to outpace his manager and teammate
Ty Cobb who hit .389. Unofficial figures released in October showed Cobb as the batting champion, but official figures released in December showed Heilmann to be the champion. He was the first right-handed batter to win the American League batting title since
Nap Lajoie in 1905. Heilmann also led the American League in 1921 with 237 hits and ranked second behind
Babe Ruth with 139 RBIs, 365 total bases, a .606 slugging percentage, 292 times on base, a 7.3 offensive
wins above replacement (WAR) rating, and 159
runs created. He also ranked among the league leaders with a .444 on-base percentage (third behind Ruth and Cobb), 43 doubles (third behind
Tris Speaker and Ruth), and 76 extra base hits (third behind Ruth and
Bob Meusel). Others attributed Heilmann's improvement to the "
live-ball era" that started in 1920 and forced outfielders to spread out and play deeper, allowing more of Heilmann's line drives to fall into the wider gaps. However,
Frank G. Menke attributed his improvement to having learned the game, noting that the "lively ball" failed to account for the fact that those who outhit Heilmann from 1914 to 1920 were no longer outhitting him. Menke observed: There is nothing picturesque, nothing highly colored, nothing bombastic or spectacular about his methods. He is not a grandstander -- not theatrical. And because he isn't, he does not get the acclaim and the plaudits which men, less wonderful, but better showmen, achieve for themselves. Though primarily a line-drive hitter, Heilmann could also hit for power. His 19 home runs in 1921 ranked fifth in the American League, and he ranked among the league leaders in home runs 11 times. On July 8, 1921, Heilmann hit a home run off
"Bullet Joe" Bush that traveled over the center field fence in Detroit and "actually made the patrons gasp in astonishment." Heilmann's home run was widely reported to have traveled 610 feet, eclipsing
Babe Ruth's longest home run of 465 feet. Detroit's grounds keeper was more conservative, reporting that no measurement was made, but estimating that it traveled more than 500 feet. The entire Tiger lineup hit remarkably well in 1921. In addition to Heilmann and Cobb's 1–2 finish for the batting title, Detroit's third outfielder,
Bobby Veach, was also among the league's best at .338. However, true to the baseball adage that good pitching beats good hitting, the 1921 Tigers lacked good pitching and finished in sixth place, 27 games behind the pennant-winning Yankees. The 1921 season marked the start of a seven-year stretch in which Heilmann compiled a .380 batting average, .452 on-base percentage, .583 slugging percentage, and averaged 116 RBIs, 41 doubles, 11 triples, 15 home runs, and 104 runs scored. His one major handicap as a player was a lack of speed that led to his being known by the nickname "Slug". He was long known as "one of the slowest men in baseball." Hall of Fame sportswriter
Tommy Holmes noted: "Heilmann was never much faster than an ice wagon on the base paths. Without doubt, he is the slowest moving great hitter who ever lived."
1922 season In February 1922, Heilmann refused to sign his contract, demanding to be paid $15,000. On March 3, 1922, Heilmann signed a contract for $12,500 with the Tigers, agreeing to report to spring training the following week. By late June, Heilmann was batting .387 and battling
George Sisler for the American League batting championship. On August 26, 1922, Heilman's season came to an end when he sustained a complete break of his
collarbone when he crashed into
Frank Brower while trying to beat out an infield hit. Heilmann had to have his collarbone rebroken and reset, and it was then discovered that Heilmann had also broken his shoulder. The injuries were so severe that Heilmann remained hospitalized until a week before the end of the season, and even after leaving the hospital, he feared he might never play again. Despite missing the last five weeks of the season, Heilmann hit a career-high 21 home runs, fourth in the American League, and also ranked among the league leaders with a .356 batting average (fourth), a .432 on-base percentage (fifth) and a .598 slugging percentage (fourth). Heilmann's efforts at handball also helped him shed excess weight, reporting in spring training at 200 pounds, 30 pounds less than he had reported in 1922. During the 1923 season, Heilmann won his second batting title, hitting .403 for the season, edging out
Babe Ruth who hit .393. Heilmann in 1923 became the fourth American League player to hit .400 or more for a season, joining
Ty Cobb,
Nap Lajoie and
George Sisler. Only one other American League player,
Ted Williams in 1941, has accomplished the feat since 1923. In addition to winning the 1923 batting crown, Heilmann had one of his best seasons as a slugger. He finished second to Ruth in on-base percentage (.481), slugging percentage (.632) and
wins above replacement (9.3). He also ranked among the American League leaders with 115 RBIs (third), 211 hits (third), 18 home runs (third), 121 runs scored (fourth), 331 total bases (fourth), 44 doubles (fourth), and 73 extra base hits (fourth). Despite hitting over .400, he finished third in the 1923 American League Most Valuable Player voting behind Ruth and
Eddie Collins. Heilmann in 1923 denied Ruth a
Major League Baseball Triple Crown for the second time; Ruth led the league in home runs and RBIs in both 1921 and 1923, but was edged out in batting average in both years by Heilmann. Heilmann worked as a
life insurance agent during the off-season in the 1920s. On October 16, 1923, after Ruth had received his World Series winner's share‚ Heilmann‚ who was friends with Ruth despite having beaten him for the batting title‚ sold Ruth a $50‚000 life insurance policy.
1924 season In 1924, Heilmann's batting average dropped by 56 points to .346, which ranked sixth in the American League. Despite the "slump" in batting average, Heilmann led the league with 45 doubles and ranked second behind Babe Ruth with a .533 slugging percentage, a 6.4
wins above replacement rating among position players, and 130
runs created. He also ranked among the league leaders with 304 total bases (third), 71 extra base hits (third), 16 triples (third), 107 runs scored (fourth), 278 times on base (fourth), a .428 on-base percentage (fifth), and 114 RBIs (fifth). He appeared in 145 games as the Tigers' starting right fielder in 1924 and had his best defensive season, leading the league with 31 outfield assists; he never had more than 18 in any other season. He also led the league's right fielders with 263 putouts. Heilmann finished ninth in the voting for the 1924 American League Most Valuable Player award. Heilmann finished with a .393 average, four points higher than Speaker. He was again among the American League leaders in most offensive categories, with 293 times on base (first), a 7.1 offensive wins above replacement rating (first), 134 RBIs (tied for first), 225 hits (third), a .457 on-base percentage (fourth), 326 total bases (fourth), a .569 slugging percentage (fifth), 40 doubles (fifth), and 64 extra base hits (fifth).
1926 season In 1926, Heilmann appeared in 141 games, 133 as the Tigers' starting right fielder, and compiled a .367 batting average, .445 on-base percentage, and .534 slugging percentage. Heilmann's .445 on-base percentage was second best in the American League, and he once again tallied more than 100 RBIs (101) and finished fifth in American League MVP voting.
1927 season In 1927, Heilmann again appeared in 141 games, 135 as the starter in right field. On August 13, Simmons led Heilmann by 26 points, .393 to .367, but Heilmann took the lead after totaling 27 hits in 11 games in the latter half of August. He then slumped in early September to fall behind Simmons and trailed by one point going into the last day of the season. He also ranked among the league leaders with a .475 on-base percentage (second), 120 RBIs (third), 201 hits (third), 50 doubles (third), 73 extra base hits (third), .616 slugging percentage (fourth), 311 total bases (fourth) and 106 runs scored (fifth). When a reporter reminded him that he had won batting titles every odd-numbered year from 1921 to 1927, Heilmann replied: "Mr. Navin [Detroit owner] gives me contracts on a two-year basis. I always bear down real hard when a new contract is coming up."
1928 and 1929 seasons In 1928, Heilmann appeared in 151 games for the Tigers, 125 as the team's starting right fielder and 24 as the starting first baseman. He compiled a .328 batting average, 70 points lower than his 1927 average of .398, but still seventh best in the American League. He also ranked among the American League leaders with 107 RBIs (fifth), 62 extra base hits (fifth), 283 total bases (fifth), 14 home runs (sixth), a .507 slugging percentage (eighth), 183 hits (eighth), and 38 doubles (eighth). During the 1930 season, Heilmann appeared in 142 games with the Reds, 106 as the team's starting right fielder and 19 at first base. He compiled a .333 batting average and .416 on-base percentage, the highest on the Cincinnati club in 1930. He also totaled 68 extra base hits, 19
home runs and 91 RBIs and ranked among the National League leaders with 43 doubles (seventh) and 64 bases on balls (eighth). While not previously known for his fielding, his 2.78
range factor in 1930 remains the second highest in major league history for a right fielder. In March 1931, Heilmann was incapacitated by arthritis in his right wrist. The arthritis was so severe that he was hospitalized for a time in the spring. He ended up missing the entire 1931 season. In January 1932, Heilmann was reported by the Reds to be in "great shape". He trained himself in Hot Springs and reported in late February that he believed himself ready. However, he appeared in only 15 games for the Reds, primarily as a pinch hitter and in five games as the team's starting first baseman. He compiled a .258 batting average in 31 at bats and appeared in his last major league game on May 31, 1932.
Career statistics • Sources: • ==Post-baseball career==