Robert Christian Knapp (born September 16, 1953) is an American former professional baseball right-handed pitcher, whose career totals include 122 Major League Baseball (MLB) games pitched, for the Chicago White Sox (1975–1977) and California Angels (1978–1980).

After graduating from Central Michigan University, Knapp was selected in the first round of the 1975 Major League Baseball draft by the White Sox.

He played parts of the 1975, 1976, and 1977 seasons with Chicago, although most of his time in the first two years of his career was spent in the White Sox farm system.

He was traded along with Brian Downing and Dave Frost to the Angels for Bobby Bonds, Richard Dotson and Thad Bosley on December 5, 1977.

[2] During his MLB career, Knapp allowed 642 hits and 250 bases on balls in 604+1⁄3 innings pitched, with 355 strikeouts and 15 total complete games.