Cy Seymour had a career season, leading the National League with a .377 batting average, 219 hits, 40 doubles, 21 triples, and driving in 121 runs. Seymour also had eight home runs, second on the club. Fred Odwell led Cincinnati with nine home runs, while he had a .241 average and drove in 65 runs. Miller Huggins hit .273 with a homer and 38 RBI, while scoring a team best 117 runs and walking 103 times. Tommy Corcoran hit only .248, but he had two homers and drove in 85 runs. Barry also played well following his trade from the Cubs, hitting .324 with a homer and 56 RBI with Cincinnati.
With Noodles Hahn missing most of the season due to an injury, Bob Ewing emerged as the ace, going 20–11 with a 2.51 ERA. Orval Overall went 18–23 with a 2.86 ERA in 39 starts in his rookie season, while Charlie Chech went 14–14 with a 2.89 ERA in his first season. In limited action, Hahn was 5–3 with a 2.81 ERA in thirteen games, eight of them starts.
The Reds got off to a bad start in 1905, going 12–16 in their opening twenty-eight games, sitting in fifth place, 10.5 games behind the New York Giants. To make matters worse, the Reds lost ace pitcher Noodles Hahn to an arm injury. Cincinnati stayed around the .500 mark until going on an eight-game winning streak to up their record to 32–24, and found themselves in third place, 6.5 games back. The team then won only three of thirteen games to fall back into fifth, 14.5 games behind the Giants. The Reds played out the rest of the season in fifth place, as they finished with a 79–74 record, 26 games behind New York.