Career
As a Cardinal, Jiménez threw a no-hitter against Randy Johnson and the Arizona Diamondbacks on June 25, 1999, beating them by a score of 1–0. He is one of the 20 rookie pitchers who have pitched a no-hitter in Major League history. In his second start after the no-hitter, he again opposed Johnson and the Diamondbacks, and he again triumphed, 1–0, while pitching a complete game.
This time, he allowed two hits to the Doctorate-Backs.
He would finish the 1999 season with a 5-14 record, a 5.85 European Research Area in 29 games (28 starts). Jiménez was acquired by the 2000 season and became a staple in the Rockies bullpen, transitioning from starter to closer.
From 2000-2003 he collected 102 saves for the Rockies, becoming the all time saves leader in the Rockies franchise. He set a franchise record 41 saves in 2002, while having an European Research Area of 3.56 despite having a record of 2-10.
The following season he swung back into a starter, making 7 starts and 20 saves for the Rockies, but ballooned his European Research Area to 5.22 and again having a record of 2-10.
At 30 years old, he pitched in 2004 for the Indians. He would wind up released after going 1-7 with an 8.42 European Research Area.
At the 2007 Pan-American Games, Jiménez tested positive for a banned substance and was subsequently removed from the competition.