Homosexuality in American football

Columns: Name | Highest level | Position
David Kopay | NFL | Running back | Ray McDonald | NFL | Running back | Conner Mertens | NCAA Division III | Placekicker | Ryan O'Callaghan | NFL | Offensive Lineman | Jeff Rohrer | NFL | Linebacker | Michael Sam | NFL / CFL | Defensive end | Chip Sarafin | NCAA Division I | Offensive lineman

Example questions:
What team did the player who came out while playing in the NCAA Division III play for ? | When did the person that played as a guard die ? | In what year was the player that played in the CFL drafted to play in the NFL ? | How many seasons did the player who came out while playing as tight end play in the NFL ?

Answers:
Willamette Bearcats | February 20 , 2014 | 2014 | thirteen