Jordan Horton Lyles (born October 19, 1990) is an American professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Houston Astros, Colorado Rockies, San Diego Padres, Pittsburgh Pirates, Milwaukee Brewers, Texas Rangers, Baltimore Orioles, and Kansas City Royals.

In his junior baseball season, he led the Red Foxes to a 4A championship, compiling a 6–1 win–loss record and a 0.85 earned run average (ERA).

[9] On April 29, Lyles was recalled to Houston to make a start for Kyle Weiland, who was placed on the 15-day DL.

[citation needed] After the game, Lyles was optioned back to Triple-A to make room for Marwin González, who was activated from paternity leave.

[8] On January 14, 2015, Lyles and the Rockies avoided arbitration, agreeing to a one-year contract worth $2.475 million.

[14] On June 1, Jordan was placed on the 15-day disabled list with a medial collateral ligament injury in his left big toe.

[15] On June 3, it was declared Lyles would need left big toe surgery, ending his season after just 10 starts.

[17] On December 17, 2017, the Padres signed Lyles to a one-year, $1 million contract to remain with the team.

[19] On May 15, 2018, Lyles threw seven perfect innings against the Colorado Rockies at home before allowing a hit in the eighth.

[8] On December 17, 2018, Lyles signed a one-year, $2.05 million contract with the Pittsburgh Pirates for the 2019 season.

[28] On September 21, Lyles tossed his second career complete game, allowing only three hits in a start against the Detroit Tigers.

[30] On December 28, 2022, Lyles signed a two-year contract with the Kansas City Royals worth $17 million.

[36] With the Oklahoma City Baseball Club, he made five appearances (four starts) and allowed 11 earned runs in 15+1⁄3 innings for a 6.46 ERA.

Lyles' 5.22 career earned run average (ERA) is the fourth highest of any pitcher in MLB history with at least 1,000 innings pitched (IP), behind only Jimmy Haynes (5.37), Scott Elarton (5.29), and José Lima (5.26);[38] his adjusted ERA+ of 81 is also the fourth highest among pitchers with 1,000 IP, behind Jim Hughey, Elmer Myers, and Bill Bailey, all of whom have an adjusted ERA+ of 80.