Darren Christopher Oliver (born October 6, 1970) is an American former professional baseball pitcher.

[2] Oliver made his major league debut on September 1, 1993, at the age of 22 at Fenway Park against the Boston Red Sox.

He was the starting pitcher in the Texas Rangers' 4–3 loss to the San Francisco Giants on June 12, 1997, at The Ballpark in Arlington.

On July 31, 1998, the Rangers traded Oliver, Fernando Tatís, and a player to be named later (Mark Little) to the St. Louis Cardinals for Royce Clayton and Todd Stottlemyre.

As a Cardinal, he was also the starting and winning pitcher in the game where Mark McGwire hit his record-tying 61st home run on September 7, 1998.

On December 22, 2009, Oliver signed a one-year $3.5 million contract to return to the Texas Rangers, with a vesting option for 2011 based on the number of games pitched.

For the 2012 season, Oliver posted the best numbers of his career, finishing with a 3-4 record, 2.06 earned run average, and 52 strikeouts in 562⁄3 innings pitched.

During the offseason, it was reported that Oliver and his agent, former Blue Jay Jeff Frye, attempted to renegotiate his contract with the Blue Jays, demanding a higher salary from the team, or a trade to the Texas Rangers to be closer to where he lives in the offseason with his family.

[18] The two wins moved Tampa Bay down into a tie with the Texas Rangers for the second wild card spot going into the final day of the regular season.

[19] On April 24, 2014, it was announced that Oliver had accepted a front office role with the Texas Rangers, working as a special assistant to general manager Jon Daniels.

Oliver served as the pitching coach for the National League team in the 2024 All-Star Futures Game.