in 1918 When Coveleski was brought up to the majors, the original intention was to use him as a relief pitcher. Due to an injury to
Ed Klepfer, the Indians used him as a starter early on in the 1916 season, and kept him in the role when he performed well. He was scheduled to pitch in the first week of the season against his brother Harry, but the matchup never took place at Harry's behest. He finished the season with a 15–13 record and a 3.41 ERA in 45 games, 27 of them starts. Coveleski's status as the
ace of the staff was demonstrated when he was named the starter for
Opening Day of the
1917 season; he beat the
Detroit Tigers 6–4 on April 11. He improved statistically during the 1917 season, winning 19 games and losing 14 with an ERA of 1.81 and a career-high 133 strikeouts. Coveleski continued to improve during the
1918 season, which was ended on September 2 due to a preseason agreement among owners to shortened season due to
World War I. His outings that year included 2–1 13-inning road loss to Philadelphia on May 15, in which he had a career-high ten strikeouts, and a 19-inning complete game on May 24 in New York as the Indians won 3–2. He finished the season with a 22–13 record, a 1.82 ERA, and 311 innings pitched in 38 games, 33 of them starts; his wins and ERA were both second in the American League to
Walter Johnson. Covaleski finished the 1920 regular season with 24 wins, 14 losses, a 2.49 ERA, and 133 strikeouts; he led the AL in strikeouts and finished second in ERA to
Bob Shawkey. Four days later, he pitched Game 4, again allowing one run and five hits in a 5–1 win. Coveleski returned to the Indians in 1921, and throughout the season, the Indians battled the Yankees for first in the American League. On September 26, the two teams faced off, but Coveleski failed to make it past the third inning; the Yankees won 8–7 to ensure they won the pennant. Coveleski pitched 315 innings in 1921, matching his career high from the year before, and had a 23–13 record and a 3.37 ERA. it was his last game of the season. He finished the year with a 17–14 record, the first time since 1917 he did not have 20 wins, and a 3.32 ERA. However, he won less frequently as the season wore on, losing three straight games in mid-August. His last game came on August 15, with over a month left in the season. On June 16 he broke
Addie Joss' club record of 160 wins with a 2–1 complete-game win over the Yankees, with the winning run scoring with two out in the bottom of the ninth on second baseman
Ernie Johnson's
error, with Coveleski batting; he had tied Joss' record two days earlier with a relief win in an 11-inning victory over the
Boston Red Sox. In his last appearance on September 22, he gave up a career-high ten runs in a 10–4 loss to the Yankees, ending the season with a 15–16 record and a 4.04 ERA. In December 1924, after nine years pitching for Cleveland, Coveleski was traded to the
Washington Senators for pitcher
By Speece and outfielder
Carr Smith. Despite Coveleski's success in Cleveland, he was not a fan of playing there; he stated that he "didn't like the town. Now the people are all right, but I just didn't like the town." He also stated that it began to affect his performance on the mound and that he began to get "lazy" from being with the club so long. He did, however, have praise for his catcher: "The best thing that happened to me there was pitching to
Steve O'Neill. He caught me for nine years in Cleveland and knew me so well he didn't even need to give me a sign". ==Washington Senators and New York Yankees==