Keith Charles Foulke (/foʊk/ FOHK; born October 19, 1972) is an American former Major League Baseball relief pitcher.

[1] In 1998, Foulke found a home in the White Sox bullpen, primarily serving as set-up man for closers Matt Karchner (who was traded to the Chicago Cubs in the middle of the season) and Bill Simas.

In 1999, Foulke established himself as one of the league's best relief pitchers, posting a 2.22 ERA in 105.1 innings of work over 67 games, however, he was still used primarily as a set-up man.

However, it was Foulke who also gave up the game-winning double to David Ortiz in Game 4 of the American League Division Series that year.

Foulke continued his dominance in his first year with the Red Sox, saving 32 games in 39 opportunities while racking up 79 strikeouts and a 2.17 ERA across 83 innings.

He induced Édgar Rentería (who would be his teammate the next season) of the St. Louis Cardinals to hit a one-bounce ground ball back to him which he flipped to first, thus clinching the Red Sox' first World Series Championship since 1918, ending the Curse of the Bambino.

In July 2004, Foulke agreed to remove the flag patch to comply with MLB rules prohibiting individual players from altering their team's uniform.

"They're not going to make it any harder than it is for me to go home and look in the mirror", Foulke said about the booing that rained down from the stands on a sticky night in the Fens.

"[5] The media also had a field day when they found out that Foulke demanded a new truck as compensation for his weekly interviews with Dale & Holley on WEEI.

[7] Foulke signed a one-year deal (with an option for a second year) with the Cleveland Indians for the 2007 season after passing a physical in January.

The announcement came as a shock to most people, as Foulke was slated to compete with Joe Borowski to fill the vacant closer's role.

In addition, his unusual throwing motion provided him with the ability to mask his changeup well, though runners on base could easily see his grip from his exposed hand and potentially tip his pitches to teammates at bat.

Foulke's son Kade was raised in Florida and played both hockey and baseball before choosing to focus on the latter sport during high school.