He played with the Pittsburgh Pirates, Boston Beaneaters, Brooklyn Superbas and Baltimore Terrapins.

Two days after Wilhelm's streak was thought to have been broken, The New York Times reported a historian found three scoreless innings which were previously left off Wilhelm's streak, indicating his record had not actually been broken.

His most notable game from that period may have been a three-hit, thirteen-inning win on Opening Day 1909; opposing pitcher Red Ames had a no-hitter going into the tenth inning.

[9] Before the 1914 baseball season, Wilhelm was signed by the Baltimore Terrapins of the Federal League (FL).

[12] In 1916, Wilhelm sued the Terrapins on the grounds he had signed a three-year contract in 1914 worth $10,500 and was not allowed to continue with the team after July 1, 1915.

The Quakers were in perfect stride during both contests and demonstrated they can lose as easily and dexterously on a holiday as on any other occasion.

"[16] Wilhelm had become the interim manager earlier in the season after Wild Bill Donovan was called as a witness in the trial surrounding the Black Sox Scandal.

[19] In 1923, Wilhelm made his final professional appearance as a player, taking part in a single game with the Rochester Tribe.

[20] Wilhelm died in 1936 and a benefit minor league game was held in Rochester to assist his widow.

[21] While playing in the minor leagues in 1907, Wilhelm pitched a long streak of consecutive innings without giving up a run.

The omitted innings had been discovered by Dave Chase, who was a baseball historian and a minor league general manager for the Memphis Redbirds.