ballhawk

plural ballhawks

1. American footballA player who is particularly good at catching interceptions.
2. ball gamesA fielder who is particularly good at catching fly balls.

   Last season, when the Giants came to town, a noted ballhawk named Wes Wagner scored tickets in the first row of the bleacher boxes in right field.

   2007 July 18, Lee Jenkins, “At Wrigley, Fans Debate What to Do With a Ball”, in New York Times

   1 more example

   They documented Waveland Avenue's ballhawk culture, where Moe Mullins, who's recovered more than 3,500, is king, and followed him home to gape at his bounty: 1,000 major-league balls hoarded like dinosaur eggs.

   2001 October 5, Deanna Isaacs, “Oddballs and True Believers/Film Center's New Marquee Player”, in Chicago Reader