Brent Bradley Knackert (born August 1, 1969) is an American former pitcher in Major League Baseball who played for the Seattle Mariners (1990) and Boston Red Sox (1996). Listed at 6' 3", 185 lb., he batted and threw right-handed.
In a two-season career, Knackert posted a 1-2 record with 33 strikeouts and a 7.04 ERA in 32 appearances, including two starts and 47⅓ innings of work.