Evan Reese Jager is an American middle- and long-distance runner who specializes in the 3000 metres steeplechase. In his speciality event, he won a silver medal at the 2016 Rio Olympics and a bronze at the 2017 World Championships. Jager is the current NACAC area record holder in the event with a time of 8:00.45. He is sponsored by Nike and is coached by Jerry Schumacher in the Bowerman Track Club.

The 3000 metres steeplechase or 3000-meter steeplechase is the most common distance for the steeplechase in track and field. It is an obstacle race over the distance of the 3000 metres, which derives its name from the horse racing steeplechase.