From cage +‎ -er.

• Rhymes: -eɪdʒə(ɹ)

cager (plural cagers)

1. (mining) A person or machine responsible for managing a mineshaft cage.
2. (dated everywhere, currently Philippines) A basketball player.
   • 2007, Thomas R. Garrett, Clay Shampoe, Old Dominion University Men's Basketball:

     In 1946, Athletic Director Chandler reliquished his position as head basketball coach at the school to one of his most proficient former players, Julius Rubin. Despite the fact that Rubin had never coached a cager squad before, he became a well-liked leader for the players assembled to start the 1946-1947 season.

3. (cycling, derogatory) A person who drives an automobile, particularly for commuting.
   • 2022 August 5, Eglė Gerulaitytė, “Top 10 Reasons Why We Love Riding”, in Adventure Rider‎^[1]:

     Motorcycles can go where cars can’t. Obscure places, remote singletrack trails, off-road tracks too narrow for four wheels – on a bike, you can literally go anywhere and access places no car ever would feeling like an explorer and discovering wild spots off-limits for cagers.

• garce, grace, Grace