OF Cy Seymour in 1905. Maybe one of the best offensive seasons a Red has ever had.
Look at his stats compared to the league leaders that year.
1905 Batting Leaders
He led the league in:
Batting Average: .377, .014 better than Honus Wagner
Slugging: .559, .054 better than Wagner
OPS: .988, second best was Wagner at .932
Total Bases: 325
He also was second in:
Basically he was one HR away from a Triple Crown. Outstanding season.