dirtbag
n.— «Turn on a baseball game any night and you’re liable to see stars not running out every groundball. The guys who run through walls and dive for balls—the “dirtbags,” as they are affectionately known—are celebrated but not always emulated.» —“Working hard for his money” by Brian Bennet Courier-Journal (Louisville, Kentucky) Apr. 21, 2006. (source: Double-Tongued Dictionary)