Robert Gustave "Bun" Troy (August 27, 1888 – October 7, 1918) was a German-born American professional baseball pitcher who was killed in action while fighting against German forces in World War I.

[5] However, the Sporting Life reported two weeks later on his release and added: "He had the speed and curves, but lacked control, and acted too much like an amateur on the ball field.

The Sporting Life described Troy as "a big fellow with lots of steam and a good curve ball" and reported that Detroit's scouts "saw in him a real diamond in the rough."

[7] In all, Troy played five seasons of minor league baseball, appeared in 159 games, pitched 914-1/3 innings, and compiled a 77–62 record.

Troy held the rank of sergeant in the 319th Infantry Regiment (Company G), which was made up of men from western Pennsylvania and some from Eastern Ohio.

[2] Troy was initially buried in France, but his remains were brought to Monessen, Pennsylvania (where his parents had moved from McDonald), and a military funeral was held there in August 1921.

A crowd of 1,000, including members of the 80th Division, packed the First Presbyterian Church and escorted his body on a caisson drawn by four black horses to Robinson's Run Cemetery where a 21-gun salute was fired, taps played, and Troy's remains buried.

[2][11] Troy was one of eight Major League Baseball players known either to have been killed or died from illness while serving in the armed forces during World War I.