It means "organized team activities"
Other Than American...
OTA stands for Organized Team Activities and is the term used for training/team activities during the off-season.
OTA
Ota Sklenčka was born in 1919.
Ota Sklenčka died in 1993.
Ryu Ota was born in 1930.
Ryu Ota died in 2009.
Ota Čermák died in 1963.
Ota Čermák was born in 1919.
Tetsuya Ota was born in 1959.
Ota Benga died in 1916.
Masamitsu Ota was born in 1892.